LOCATIONS

THE CIRCULATORY SYSTEM - LOCATIONS

● Blood: contained in the heart and in the blood vessels of the circulatory system
● Tissue Fluid (Intracellular Fluid): occupying spaces between cells in the organs
● Lymph: contained within lymph vessels and lymphatic organs
● Antigens: present on the surface of red blood cells
● Heart: in the centre of the chest, between the lungs and above the diaphragm
● Pulmonary Artery: arises from the right ventricle
● Aorta: arises from the left ventricle
● Coronary Arteries: arise from the base of the aorta
● Atrio-ventricular valves: between the auricles and ventricles of the left (mitral) and right (tricuspid)
● Pulmonary semilunar valve: aperture between right ventricle and pulmonary artery
● Aortic semilunar valve: aperture between left ventricle and aorta
● Papillary Muscles: muscular projections of ventricular wall attached to cusps of atrioventricular valves via
chordae tendinae
● Chordae Tendinae: tendinous strands arising from the papillary muscles attached to apices of
atrioventricular valves
● Tonsils: located on the sides of the neck
● Spleen: situated in the abdomen, behind the stomach and above the left kidney

THE EXCRETORY SYSTEM - LOCATION

● Kidneys: located on either side of the backbone in the abdominal cavity, beneath the diaphragm,
protected by the last two ribs
● Ureter: arises from the hilum in the median surface of each kidney and connects behind with the urinary
bladder
● Pelvis: the front end of the ureter is somehow expanded into the kidney
● Sphincter Muscle: it guards the opening of the bladder into the urethra
● Papilla: it is the apex of each pyramid in the medulla which projects into the pelvis of the kidney
● Renal Column: portions of conical tissue extend in between adjacent renal pyramids
● Glomerulus: lodged in the outer concavity of the bowman’s capsule
● Bowman’s Capsule: located in the cortex of the kidney
● Malpighian Capsule (Renal Capsule): located in the cortex of the kidney
(The bowman’s capsule with the renal capsule gives the cortex its dotted appearance)
● Loop of Henle: it runs through the medulla to turn back and re-enter the cortex to continue into the next
convoluted tubule

THE NERVOUS SYSTEM

● Dendrites: they are branched cytoplasmic projections of the cell body
● Axon: it is a long process from the cell body
● Synaptic Cleft: it is the gap between the axon terminal of one neuron and the dendrite of another neuron
● Myelin Sheath: it is a white insulating sheath surrounding the axon
● Brain: protected inside the cranium of the skull
● Dura Mater: outermost membrane of the brain
● Arachnoid: middle membrane of the brain
● Pia Mater: innermost membrane of the brain
● Cerebrospinal Fluid: fills the central spaces (ventricles) of the brain and the central canal of the spinal cord
● Corpus Callosum: sheet of fibres connecting the two hemispheres of the cerebrum
● Cerebellum: located just at the base of the brain and under the large cerebrum
● Medulla Oblongata: lowest portion of the brain located at the base of the skull
● Hypothalamus: located below the thalamus
● Pons: located in the centre of the brain below the cerebellum
● The Spinal Cord: extends from the medulla of the brain down almost the whole length of the backbone to
end at the second lumbar vertebra and lies within the neural canal of the vertebrae
● Nerves of the Sympathetic System: they arise from the spinal cord between the neck and waist region
● Nerves of Parasympathetic System: located anteriorly in the head and neck and the other posteriorly in the
sacral region

SENSE ORGANS
● Orbits: two eyes are located in deep sockets or orbits on the front side of the head
● Tear glands: located the upper sideward portion of the orbit
● Conjunctiva: thin membrane covering the entire front part of the eye
● Iris: it is an extension of the choroid, partially covering the lens and leaving a circular opening in the
centre
● Pupil: the circular opening in the centre of the lens
● Rod cells: distributed almost throughout the retina
● Cones: mostly confined to the yellow spot
● Yellow Spot: it lies at the back of the eye, almost at the centre on the horizontal axis of the eyeball
● Blind Spot: it lies lateral to the yellow spot on the nasal side
● Lens: located just behind the pupil
● Suspensory Ligament: is attached to the lens
● Ciliary Body: located at the junction of the iris and choroid
● Aqueous Chamber: it is the front chamber between the lens and cornea
● Vitreous Chamber: it is the larger cavity of the eyeball behind the lens
● Malleus: it is attached to the inner surface of the eardrum
● Incus: it is in between the malleus and the stapes, in the middle ear
● Stapes: it is connected to the incus and the flat part is connected to the anvil
● Oval Window: membrane covered opening leading to inner ear
● Round Window: connects middle and inner ear
● Endolymph: located in median cochlear canal
● Perilymph: located in vestibular and tympanic canal of the cochlea
● Semicircular Canals: they are the other part of the inner ear, arranged at right angles to each other so that
one is horizontal and the other is vertical
● Organ of Corti: the median cochlear canal
● Eustachian Tube: it connects the cavity of the middle ear with throat
● Auditory Sensory Cells: Located on the basilar membrane
● Ampulla: It is the widened base of the semicircular canals

THE ENDOCRINE SYSTEM

● Adrenal Glands: they are caps on top of each kidney
● Pancreas: It lies along the lower margin of the stomach in the loop of duodenum
● Thyroid: situated in front of the neck just below the larynx joined by a narrow isthmus
● Pituitary: it is small projection which hangs from the base of the midbrain below the hypothalamus
● Insulin: secreted by beta cells
● Glucagon: secreted by alpha cells

THE REPRODUCTIVE SYSTEM

● Testes: contained in a thin-walled sac of skin called scrotum
● Seminiferous Tubules: located in the lobules of testis
● Interstitial Cells: they are packing tissues between the coils of seminiferous tubules
● Epididymis: it is a cap on the upper pole of the testis and is continued by the side of the testis upto its back
● Sperm Duct: arises from the epididymis and travels upward into the abdomen passing through an
inguinal canal, the two sperm ducts loop over the ureters of their side and join the urethra at the back of
the urinary bladder
● Seminal Vesicles: located between the posterior surface of the urinary bladder and the rectum
● Prostate Gland: it surrounds the urethra close to its origin from the bladder
● Bulbo-urethral Gland: they open into the urethra just before it enters the penis
● Penis: it lies in front of the scrotum
● Ovaries: they lie in the lower portion of the abdominal cavity, one on each side of the vertebrae
● Oviducal Funnels: they open into the uterus
● Uterus: it is situated in the pelvic cavity between the urinary bladder and the rectum
● Vagina: it starts from the lower end of the uterus upto the outside
● Vulva: it is the external female genitalia
● Clitoris: it is located in the uppermost angle of the vulva in front of the urethral opening
● Acrosome: it is at the top of the head of the sperm
● Amnion: It is a sac which develops around the embryo before the formation of allantois
● Amniotic Fluid: it fills the space between the amnion and the embryo
● Placenta: it is attached to the uterine wall
● Allantois: it is an extension from the embryo

UNIT: PLANT
● Centrioles: located near the nuclear membrane
● Nucleus: located in the cytoplasm of the cell
● Stomata: they are minute openings in the epidermal layer of leaves
● Guard Cells: they are bean shaped cells surrounding the stomata
● Cuticle: it is a waxy layer secreted by the epidermis on the two surfaces of the leaf
● Lenticels: they are special openings that develop on the bark of older stems
● Hydathodes: they are located on the margins of leaves
● Chlorophyll: it is contained in chloroplasts, in the walls of thylakoids
● Chloroplasts: they are contained in the mesophyll cells of leaves, guard cells of stomata and epidermis of
young green stems
● Stroma: it is the living matrix or ground substance of chloroplast
● Thylakoids: they are located in the chloroplast connected by frets and stacked like coins
● Auxins: they are produced in apical meristems of root and shoot, young flower buds, young leaves and
developing seeds
● Gibberellins: it is located in meristematic regions like root apex, stem apex, buds and seeds
● Cytokinins: it is synthesised in cells of endosperm and roots and are largely distributed among
germinating seeds, developing fruits, embryos
● Ethylene: it is a gaseous plant hormone produced in fruits
● Abscisic Acid (ABA): it is found in the chloroplasts of some leaves, angiosperms, gymnosperms,
pteridophytes and some mosses

FULL FORMS
IAA: Indole-3 Acetic Acid
MTP: Medical Termination of Pregnancy
TSH: Thyroid Stimulating Hormone
ACTH: Adrenocorticotropic Hormone
LH: Luteinizing Hormone
FSH: Follicle Stimulating Hormone
GH: Growth Hormone
DDT: Dichlorodiphenyl trichloroethane
IUD: Intrauterine Device
SAN: Sino-atrial node
AVN: Atrio-ventricular node
NADP: Nicotinamide Adenine Dinucleotide Phosphate
ATP: Adenosine Triphosphate
ADH: Antidiuretic Hormone
 Biology ICSE 10TH

Name the following:

2014

(i) The part of the brain associated with memory.

(ii) The ear ossicle which is attached to the tympanum.
(iii) The type of gene, which in the presence of a contrasting allele is not expressed.
(iv) The hormone secreted by islets of langerhans.
(v) The process of conversion of ADP into ATP during photosynthesis.

2015

(i) The process of uptake of mineral ions against the concentration gradient using energy from cell.
(ii) The form in which glucose is stored in liver.
(iii) The vein that carries oxygenated blood.
(iv) The cross between two parents having one pair of contrasting characters.
(v) The structure formed by the villi of the embryo and the uterus of the mother.

2016

(i) The exchange of chromatid parts between the maternal and the paternal chromatids of a pair
of homologous chromosomes during meiosis.
(ii) The number of individuals inhabiting per unit area.
(iii) The immunity acquired by providing readymade antibodies from outside for treating certain
infectious diseases.
(iv) The pollutants that cannot be broken down to simple and harmless products.
(v) The part of the brain that carries impulses from one hemisphere of the cerebellum to the other

2017
(i) The process by which root hairs absorb water from the soil.
(ii) The organ which produces urea.
(iii) The kind of lens required to correct Myopia.
(iv) The pituitary hormone which stimulates contraction of uterus during child birth.
(v) The international health organisation which educates people in accident prevention.
2018
(i) The organization which procures and supplies blood during an emergency.
(ii) The blood vessel which supplies blood to the liver.
(iii) The number of chromosomes present in a nerve cell of a human being.
(iv) The layer of the eyeball that forms the transparent Cornea.
(v) The wax-like layer on the epidermis of leaves which reduces transpiration.

2019
(i) The layer of the eyeball that provides nourishment to the eye.
(ii) One gaseous compound which depletes the ozone layer.
(iii) The structure which connects the placenta and the foetus.
(iv) A pair of corresponding chromosomes of the same shape and size and derived one from each
parent.
(v) The compound formed when haemoglobin combines with carbon dioxide in blood.

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 Biology ICSE 10TH

2020

(i) The process of transformation of several glucose molecules into one molecule of starch.

(ii) The point of attachment of two chromatids.

(iii) The iron containing pigment in erythrocytes.

(iv) The duct which transports urine from the kidney to the urinary bladder.

(v) The part of the brain which is concerned with memory.

a) Give biological /technical terms for the following: [from Prelims papers]

1. Bundle of muscle fibres that begins from AVN and extends to inter ventricular septum.
2. Outer most foetal membrane.
3. Branches of fibres of Bundle of HIS.
4. Process of conversion of many glucose molecules to a starch molecule.
5. A solution in which the relative concentration of water molecules is more than the cell sap.
6. Hormone secreted by pituitary gland which stimulates the secretion of other endocrine glands.
7. The number of people living in a square km area at a given time.
8. Twins formed from the division of a single zygote.
9. Removal of starch from the experimental leaf of the plant by keeping it in the dark for 48 hours.
10. Fruits formed without fertilization.
11. Study of fossils.
12. Theory of Lamarck.
13. Theory of Darwin.
14. Apical bud suppresses the growth of lateral bud.
15. The increase in temperature of earth due to greenhouse gases.
16. The process of focusing the eye at different distances to get a near and far away vision.
17. The regulation of right concentration of water and salt in the body.
18. The fluid present inside the inner ear.
19. Extensions from the embryo.
20. Receptors for touch, pressure of skin due to mechanical change.
21. Receptors for sound.
22. The DNA wound around eight histone molecules.
23. Artificially arranging the chromosomes according to their shape and size.
24. The muscles in the human eye which are concerned with the focusing of objects at different
distances.
25. The enzyme secreted by acrosome of sperm.
26. The surgical technique for the human female that can be used to prevent pregnancy.
27. The inward movement of solvent molecules through the plasma membrane of a cell.
28. The blood vessel that carries deoxygenated blood to the right atrium.
29. The structural and functional unit of Kidney.
30. A natural process that helps heating of the earth's surface and makes the atmosphere suitable
for life.
31. A membrane that surrounds the developing embryo and secretes a protective fluid.
32. The hormone that stimulates the sympathetic nervous system.
33. A nitrogenous base which forms hydrogen bonds with Guanine.

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34. Structures through which guttation occurs.

35. The blood plasma from which fibrinogen has been removed.
36. A radioactive pollutant that raises the risk of thyroid cancer.
37. The photoreceptor cells that are sensitive to bright light.
38. The phase of cardiac cycle in which the auricles contract.
39. Site for photochemical phase.
40. The process of squeezing out of WBC through the capillary walls.
41. The phase of mitosis in which nuclear membrane reappears.
42. The number of spinal nerves in humans.
43. Any eye defect in which the eye lens loses flexibility.
44. The hormone of pituitary gland which controls the activity of thyroid gland.
45. The pressure exerted by the cell content on the cell wall.
46. The bidirectional movement of food in the plant.
47. The structure on the leaves through which guttation occurs.
48. The site of light reaction.
49. The blood vessel having highest amount of ammonia.
50. The outermost layer of meninges.
51. The part of the chloroplast where the dark reaction of photosynthesis takes place.
52. The exudation of sap from the injured parts of the plant.
53. The eye defect caused due to shortening of the eye ball from front to back.
54. The kind of lens required to correct myopia.
55. The complex structure formed by the combination of DNA and histone.
56. The condition of a cell placed in a hypertonic solution.
57. The cell division that occurs during the formation of gametes.
58. The condition in which females develop facial hair
59. The force by which water molecules stick together during ascent of sap.
60. The condition in which lens of the eye becomes opaque.
61. The outer tough fibrous layer of meninges.
62. The liquid present in the eye which helps in the refaction of light.
63. The fluid present between the protective membranes of the heart.
64. The hormone that regulates the basal metabolic rate.
65. Uterine wall that is shed during menstruation.
66. Loss of water as droplets from the margins of certain leaves.
67. The respiratory pigment found in erythrocytes.
68. The wax like layer on the epidermis of leaves which reduces transpiration.
69. Part that darkens the eye from inside.
70. The cell body of a nerve cell.
71. Structure that initiates cell division.
72. A solution whose concentration is higher than that of the cell sap.
73. The hormone that regulates the basal metabolic rate.
74. The part of the internal ear related to the static balance of the body.
75. The soluble protein in blood plasma responsible for blood clotting.
76. The chemical substance which initiates the process of clotting of blood.
77. A membrane that disappears during prophase.
78. The uptake of mineral ions against the concentration gradient.
79. The phenomenon observed in Nasturtium in the early hours.
80. The severe pain caused by the lack of blood supply to the heart muscles.
81. The number of chromosomes in nerve cells.

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82. The stage in mitosis where furrow appears in the middle of the cell membrane.
83. The only gaseous plant hormone.
84. The innermost layer of the meninges.
85. The canal through which the testis descends into the scrotum just before the birth in a male
child.
86. The form in which glucose in stored in the liver.
87. The pigment present in the rods.
88. The protein found in blood plasma that acts as an anti-coagulant.
89. Growth movements in plants in response to the stimulus of touch.
90. The type of cell division that results in the formation of pollen grains.
91. The source of oxygen formed during photosynthesis.
92. The disease caused due to the hyposecretion of vasopressin.
93. The leucocyte that produces antibodies.
94. The part of the inner ear responsible for static equilibrium.
95. The process of the chloroplast in which the light reaction occurs.
96. The structure formed in a plant cell which results in cytokinesis.
97. The respiratory pigment found in erythrocytes.
98. The hormone located in the apical meristem.
99. The part of the chloroplast where the light reaction of photosynthesis takes place.
100. The Vehicular Standard for controlling air pollution.
101. Artery that carries deoxygenated blood.
102. Act of giving birth to the child.
103. One Y-linked inheritance.
104. The science and statistical study of human population.
105. The chemical released by basephils which dilates the blood vessels.
106. Tendency of water molecules to stick to the surface of the xylem vessels.
107. The type of cell division that occurs during repair of worn out tissues.
108. Any observable character which is genetically controlled.
109. The tissue that transports manufactured starch.
110. An apparatus used to measure the rate of transpiration in cut shoot.
111. A gaseous hormone.
112. Organelle responsible for synthesis & transport of proteins.
113. The complimentary pyrimidine nitrogenous bases.
114. Condition where a pair of chromosomes have dissimilar alleles.
115. A hormone which initiates release of glucose in the blood.
116. The components of a nucleotide.
117. Any two hormones produced by placenta.
118. Any two male accessory reproductive organs.
119. Stoppage of menstruation.
120. Number of days for which pregnancy lasts in human beings.
121. Two layers of the uterine wall.
122. The part of the eye responsible for eye colour.
123. A vestigial organ.
124. An instrument used to nullify the effect geotropism.
125. The pressure exerted by the cell wall on the cell contents.
126. The part of the ear that equalises the air pressure.
127. Defect of the eye caused due to uneven curvature of the cornea.
128. The pressure exerted by the cell wall on the cell contents.

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129. The process of sperm production.

130. The process of movement of molecules, using energy from the plant cell.
131. The pituitary hormone which stimulates contraction of the uterus during child birth.
132. The kind of lens required to correct Myopia.
133. The part of the brain that carries impulses from one hemisphere of the cerebrum to the other.
134. A pollutant that cuts down the oxygen carrying capacity of the RBC.
135. The hormone secreted by corpus leteum to prepare the uterus to receive the embryo.
136. The condition of extra growth of bones in the jaws, hands and feet, in adults.
137. Immunity due to genetic make-up of an individual.
138. The group of synthetic drugs containing sulphur.
139. The protective membranes around the brain.
140. The number of chromosomes present in the human gametes.
141. The paper which is used to show loss of water through stoma of leaf.
142. The foreign body that induces the formation of antibodies in the body.
143. A non-biodegradable pesticide.
144. A change in the internal environment which brings a change in the activities of the organism.
145. The nutritive layer of the eye which also prevents reflection of light.
146. The structure that guards the left auriculo ventricular aperture.
147. The organization that promote and support projects for research on diseases.
148. The suppressed allele of a gene.
149. The region of attachment of chromosomes to spindel fibres is called.
150. The dissimilar pair of genes present in an individual are known as.
151. The spreading of molecules evenly within the space they occupy.
152. Light reaction of photosynthesis takes place in ______ of chloroplast.
153. The command for the heart beat starts from.
154. The instrument used to measure heart beat.
155. The process by which the kidney regulates the water content of the body.
156. The endocrine cells present in pancreas.
157. The tubular knot fitting like a cap on the upperside of the testes.
158. Origin of new species by gradual modification.
159. The type of cell division which occurs in pollen sac of male flower.
160. The cells which regulate the openings in the epidermis of leaves.
161. Glandular secretion in the body which is directly poured into the blood.
162. A fluid connective tissue which drains away excess tissue fluid and metabolites and returns
proteins to the blood from tissue spaces.
163. A phytohormone which inhibits apical dominance and causes expansion of cotyledons.
164. A hormone, presence of which in urine, provides for certain tests of pregnancy.
165. A surgical method of sterilization in males for population control.
166. The radioactive waste from research center that reached the market streets in Mayapuri,
Delhi in 2010.
167. The hormone which promotes lactation.
168. The spontaneous change observed in the DNA/genes.
169. The cell organelle which contains digestive enzymes.
170. The device that measures the rate of water intake by a plant.
171. The type of organisms which cause diseases or harms its host in other ways.
172. The iron containing pigment in erythrocytes.
173. The point of attachment of two chromatids.
174. The process of transformation of several glucose molecules into one molecule of starch.

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175. The chemical released by basophils which dilates the blood vessels.
176. Tendency of water molecules to stick to the surface of xylem vessels.
177. The innermost layer of meninges.
178. The part of inner ear responsible for dynamic balance of the body.
179. The point of attachment of two chromatids.
180. The part of cell that consists of tubules, vesicles and vacuoles.
181. The complex consisting of DNA strand and eight histone molecules.
182. The abnormality where the blood passes into urine.
183. A common eye disease in which the outermost layer of the eye turns red due to a viral
infection.
184. The structure that joins the two hemispheres of the brain.
185. The cell organelle responsible for protein synthesis.
186. The part in the chloroplast where the light reaction takes place.
187. A phenomenon in which the cell sap escapes from ruptured or cut surfaces of a plant.
188. Mineral ions which help thrombokinase to convert prothrombin to thrombin.
189. The proteins that help in the coiling and packaging of DNA into structural units called
nucleosomes.
190. The fluid present between the lens and the cornea.
191. The outermost protective membrane of brain.
192. The depletion of this layer in the atmosphere can lead to skin cancer.
193. The fluid entering the Bowman's capsule.
194. The site of photochemical phase of photosynthesis.
195. The hormone controlling permeability of the DCT.
196. The phenomenon where living or dead cells absorb water by surface attraction.
197. A semipermeable membrane.
198. Structures along margin of leaves through which water exudes out.
199. The duet which transports urine from the kidney to the urinary bladder.
200. The process of uptake of mineral ions against the concentration gradient using energy from cell.
201. The hormone that inhibits apical dominance.
202. Protein that constitutes the chromatin fibre.
203. Blood vessel carrying the most oxygenated blood.
204. The scientist who proposed the evolutionary theory "Inheritance of acquired characters."
205. The structure formed by coiling and supercoiling of chromatin fibres.
206. A disease in which hypoglycemia and increased susceptibility to infections is seen.
207. The apparatus which do not measure the water lost during transpiration but measure the
water uptake by the cut shoot.
208. The reversal of plasmolysis.
209. The condition when both the alleies are identical.
210. Movement of molecules from a region of high concentration to a region of low
concentration.
211. The structure where photophosphorylation takes place.
212. The valve present in the opening of inferior vena cava.
213. Knot like mass of blood capillaries inside the bowman's capsule.
214. The phase of the cardiac cycle in which the auricles contract.
215. The stage of mitosis where chromosomes are seen upon the equator.
216. The fully expanded state of a cell.
217. The coloured part of the eye.
218. The blood vessel supplying blood to the kidney.

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219. Phytohormone used in ripening of fruits.

220. A neurotransmitter.
221. The pressure exerted by the cell contents on the cell wall.
222. The type of gene, which in the presence of a contracting allele is not expressed.
223. The basic unit of human brain.
224. The mineral element essential for proper functioning of the thyroid.
225. The organ responsible for formation of sperms.
226. The fluid surrounding the developing embryo.
227. The fluid which surrounds the foetus.
228. The exceptionally high rate of growth of human population.
229. The chemical element that caused minimata disease in Japan.
230. The animal for which Rh stands in the context of blood group.
231. The kind of blood vessel with no muscular walls.
232. The place of best vision in the retina of the eye.
233. The structure in the leaves that allow guttation.
234. The condition caused by over secretion of insulin.
235. The main auxin found in most plants.
236. Pollutants not present in nature synthesized and released only by man.
237. The other name of internal ear
238. The suppressed allele of a gene
239. The centre of reflex action
240. Condition of a cell placed in hypotonic solution
241. Openings on the stem through which transpiration occurs
242. The photoreceptor cells of the retina that is sensitive to colour.
243. A pair of corresponding chromosomes of the same size and shape, one from each parent.
244. The only plant hormone which is gas at ordinary temperature.
245. The escape of the plant sap from the cut surfaces of a plant.
246. The statistical study gaseous of human population.
247. The onset of menstruation in a young girl.
248. A condition in which a person passes blood cells with urine.
249. Number of deaths per thousand of population per year.
250. Splitting of water molecules in presence of light in the grana of the chloroplast.
251. Loss of cell sap due to injury to the plant.
252. A pigment present in urine which imparts yellow colour.
253. The phase of meiosis at which homologous chromosomes are separated.
254. An alteration in the genetic material that can be inherited.
255. The condition of a cell in which the cell contents are shrunken.
256. Colourless ground substance inside the chloroplasts.
257. The force which pushes sap in the xylem vessels.
258. Abnormal decrease in the number of white blood cells.
259. The cell formed by the union of two gametes.
260. The process of breakdown of water in presence of sunlight.
261. The cells that produce the male hormone.
262. The eye defect that is corrected by the concave lens.
263. The gaseous plant hormone.
264. Exchange of genetic material between non-sister chromatids.
265. The type of gene, which in the presence of a contrasting allele is not expressed.
266. The tuft of capillaries inside the Bowman's capsule.

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267. The hormone secreted by the alpha cells of Islets of Langerhans of the pancreas.
268. A pollutant which is mainly responsible for causing acid rain.
269. The collective term for the membranes covering the brain and spinal cord.
270. The structure through which the produced food is conducted in plants.
271. Vehicular norms applicable to all vehicles in India.
272. The process due to which wooden doors swell up in the rainy season.
273. The layer which prevents the entry of UV-B rays coming down from the sun.
274. The Condition of a cell in which its cell wall is rigid and stretched.
275. The process of squeezing of WBC out of capillary wall into surrounding tissue.
276. The hormone released by the beta cells of islets of Langerhans
277. The surgical method of contraception in women.
278. The process by which ova producing cells give rise to a mature ovum.
279. The pigment present in the rod cells of the retina.
280. Any agent or an environmental change which initiates a response in the body.
281. The set of genes present in the cells of an organism.
282. The type of bond joining the complementary nitrogenous bases.
283. Oozing out of plant sap from the ruptured or cut surface of a plant.
284. One X-linked inheritance.
285. The act of passing urine out of the body.
286. Observable character of an organism which is genetically controlled.
287. The process of focussing the eye at different distances.
288. The full-term development of embryo in the uterus.
289. The number of deaths per 1000 individuals of a population per year.
290. The bone attached to tympanum in the middle ear.
291. Cytoplasmic organelle that helps in the manufacture of starch.
292. The canal through which the testes descend into the scrotum just before birth in a human
male child.
293. The repeating component of each DNA strand lengthwise.
294. Hormone secreted by the delta cells of the islets of Langerhans.
295. Middle layer of the eye.
296. The technical terms used for the difference between natality and mortality.
297. The hormone that stimulates the development of secondary sexual characteristics in female.
298. Blood vessels that have valve in them.
299. A non-cellular layer secreted by the upper epidermal cells of a plant.
300. Suppressed allele of a gene
301. Blood vessel that begins in capillaries and end in capillaries.
302. Ear ossicles attached to tympanum.
303. The uptake of mineral ions against the concentration gradient.
304. The hormone that regulates the basal metabolic rate.
305. The stimulus which is responsible for twining of tendrils in pea plant around the support.
306. The main nitrogenous waste in urine.
307. The kind of lens required to correct Myopia
308. The part of the brain associated with coordination of muscular activity.
309. Stimulus which causes thigmotropism.
310. The central space of the brain.
311. The soluble vitamin essential for the production of prothrombin.
312. Menstrual phase in which amount of oestrogens produced by the ovary increases.
313. The condition affecting older people who cannot see near objects clearly.

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314. The condition where excess of albumin passes with urine.

315. The process of WBC’s squeezing out through the walls of the blood capillaries.
316. The accessory gland in human males whose secretion activates the sperms.
317. The hormone secreted by alpha cells of the pancreas
318. The disorder in which the blood does not clot.
319. The seat of reflex action
320. The cords that arise from the ventricular muscles hold the flaps of the bicuspid and tricuspid
valves in position.
321. The movement of molecules of a substance from a region of their higher concentration to
region of their lower concentration when they are in direct contact.
322. The act of expelling the full term foetus from the mother’s uterus.
323. The splitting of water molecules into hydrogen ions and oxygen in the presence of light.
324. The aggregates of the cytons of nerve cells from which the nerve fibres may arise or enter
into.
325. Organ in which urea is synthesized from extra amino acids.
326. One Hormone secreted by adrenal cortex.
327. Statistical term used to determine the number of deaths per 1000 of population per year.
328. Part of Hindbrain located in the centre of the brain below the cerebellum.
329. Alternative form of a character.
330. The mineral element essential for the clotting of blood.
331. The mineral ion required for the clotting of the blood.
332. The statistical study of the human population of a region.
333. The nutritive layer of the eye which also prevents reflection of light.
334. The structural and functional unit of the kidney
335. That part of the chloroplast where the light reaction of photosynthesis takes place.
336. Hormone producing tissue of the ovary that remains after the ovulation process.
337. The type of tropic response shown by germinating pollen grains when they land on the
stigma of a flower.
338. The plant with sunken stomata.
339. The part of a neuron mainly found in the white matter of the spinal cord.
340. The specific parts of a chromosome which determine heredity characteristics.
341. The valve present between the right atrium and right ventricle.
342. A solution whose concentration is greater than that of the cell sap.
343. The complex structure consisting of DNA strand and a core of histone proteins.
344. The region of best vision in the structure of eye.
345. A neuro transmitter present at the terminal end of an axon.
346. The cells which produce male sex hormone.
347. A blood vessel that starts with capillaries and also ends in capillaries.
348. A biological process by which leaves of a certain plants exhibit water droplets along their
margins in the morning.
349. All nuclear changes that occur during cell division.
350. The process by which roots absorb water.
351. The part of the ear which magnifies the vibrations received from the eardrum.
352. The term used for matured follicle in females.
353. An organ that produces fibrinogen.
354. The physical expression of genes in an individual.
355. Phytohormone that promote ripening in fruits.
356. The full complement of DNA (including all genes and the intergenic regions) of an organism.

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357. Bowman’s capsule and Glomerulus together

358. The inner ear
359. The alternate expansion and the elastic recoil of the wall of an artery during ventricular
systole.
360. The ratio in which imbalance triggers cell division.
361. The structure of nervous system that has, gathering of cytons only.
362. The counting of population of a country / region by the govt. after a time internal for
demographic study etc.
363. The category of organisms that prepare their own food from basic raw materials.
364. The valve present in between the chambers of the right side of the human heart.
365. The three component of nucleotides.
366. The pollutant which is mainly responsible for causing acid rain.
367. The fully developed part of the ovary containing a mature egg.
368. Part of ovary that produces progesterone
369. The process of RBC’s formation
370. Clean India movement
371. Functions that need transport are performed by.
372. The hormone which is a gas at ordinary temperature
373. The emergency hormone
374. The part where the sperms are produced in the testes.
375. The cross in which two pairs of contrasting character are considered.
376. The cells which possess the power of amoeboid movement.
377. The exudation of sap from the injured plant part.
378. The term used for mature follicle in females.
379. Movement of substances into root cells without the expenditure of energy.
380. The plant hormone which stimulates the ripening of fruits
381. The pituitary hormone which stimulates contraction of uterus during parturition.
382. The part of the brain which controls temperature.
383. The part of the ear, which magnifies the vibrations received from the eardum.
384. Artificially arranging the chromosomes according to their sizes and shape for purpose of
study.
385. A compound which picks up the hydrogen ions during the photochemical phase.
386. Granular leucocyte which stains dark red with acidic dye.
387. Bundle of axons of separate neurons, enclosed in tubular sheath.
388. The enzyme secreted by the head of the sperm for dissolving the wall of the ovum.
389. The process that occurs when a cell is placed in pure distilled water.
390. The blood vessel that transports nutrients from the gut to the liver.
391. The building blocks of DNA.
392. The structures through which guttation occurs.
393. The mineral needed for the production of chlorophyll
394. The hormone that helps to increase the reabsorption of water from the kidney tabule.
395. The form in which glucose is stored in the liver.
396. The structure formed by the villi of the embryo and the uterus of the mother.
397. The type of gene, which in the presence of a contrasting allele is not expressed.
398. A non-biodegradable water.
399. Part of the brain responsible for the balance of the body.
400. Repeating units that constitute the DNA strands
401. Pigment providing colour to urine

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402. The antiseptic substance present in tears

403. It is the difference between birth rate and death rate of a population.
404. The convoluted part of renal tubule that opens into the collecting tubule.
405. Eye lens losing flexibility resulting in a kind of long sightedness in elderly people.
406. A greenhouse gas.
407. The phase in mitosis when the nucleolus starts disappearing.
408. The type of transpiration that occurs from the surface of the leaf.
409. An instrument used to measure blood pressure.
410. Scientific name of pea plant
411. Site of urea production.
412. Structure connecting two cerebral hemispheres.
413. The ‘stress hormone’ in plants.
414. The plant hormone that stimulates plant growth by cell division.
415. The mineral ion that helps in the conversion of Prothrombin to Thrombin
416. The enzyme released by the sperm to enter the ovum.
417. Any one material that passes from mother to foetus.
418. Disorder caused due to deficiency of ADH.
419. The part of the ovary that produces oestrogen and progesterone.
420. Packing tissues between coils of seminiferous tubules.
421. Small differences between the individuals of the same species.
422. A condition in which blood passes with urine due to some infection in the urinary tract.
423. The layer of the eyeball that provides nourishment to the eye.
424. The hormone produced from adrenal medulla.
425. A condition in which some people by birth cannot discriminate between certain colours as
red and green.
426. The growth movement of plant parts in response to touch stimulus.
427. The hormone that stimulates Adrenal cortex.
428. Tonicity of the cell whose relative concentration of water molecules and the solute
molecules on either side of the cell membrane is same.
429. A plant hormone which increases tolerance to stress.
430. Tissue responsible for ascent of sap in plants.
431. Structure that initiates cell division in animal cell
432. Cells which controls opening and closing of stomata
433. The machine which is known as artificial kidney
434. Bony socket in which the eyeball is well protected.
435. The nitrogenous base which pairs with Thymine.
436. Waxy coating on the leaves that reduces transpiration.
437. The longest phase of cell cycle.
438. The condition of cell in which the cell contents are shrunken.
439. Only phytohormone that is gaseous at room temperature.
440. The protective membrane of the brain.
441. The outward diffusion of water through a semipermeable Membrane.
442. The cell division leads to the production of haploid cells.
443. The kind of chromosomes that determine the general body features.
444. The hormone responsible for apical dominance.
445. The place where light dependant reactions takes place.
446. Three principal fluids in our body.
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