iY eels HIRANANDANI FOUNDATION SCHOOL, THANE First Preliminary Examination ~ November, 2022 Subject: Biology Std. X Time: 2 hrs. Date: 05/12/2022 Max. Marks: 80 Answers to this paper must be written on the paper provided separately. You will not be allowed to write during the first 10 minutes. This time is to be spent in reading the question paper. The time given at the head of this paper is the time allowed for writing the answers Section A is compulsory. Attempt any four questions from Section B. The intended marks for questions or parts of questions are given in brackets [ J. This paper consists of 6 printed pages. Section A (Attempt all questions from this Section) Question 1 Select the correct answers to the questions from the given options. (Do not copy the question. Write the correct answer only): 15] () Identify the structure which is not a part of the membranous labyrinth: (a) Cochlea. (>) Tympanum. (©) Semicircular canals. (4) Vestibule. Gi) Hypothyroidism in children causes: (@) Simple goitre. (&) —_Exophthalmic goitre. (©) | Myxoedema. @ ~— Cretinism, Gii) Blood from the pre-caval flows into the: (@) Right atrium. (©) Right ventricle (© Left atrium. (@) Left ventricle (iv) Tn comparison to gravity, which one of the following is a more effective stimulus for the growth of roots? (@) Touch. (&) Light. (c) Water. (d) Seasonal changes, (v) The two strands of a DNA molecule are joined by: (@) Hydrogen bonds between the sugars. (b) Hydrogen bonds between the nitrogenous bases, (©) Hydrogen bonds between sugar und phosphate, (d) Hydrogen bonds between the complementary nitrogenous bases.‘Which one of the following 1s not related to mgm “ness (vii) (a) Deficiency of Vitamin A. (b) Poor vision in dim light. (© Genetic disorder. (4) Non-formation of rhodopsin. (viii) The part of a nephron involved in ‘Tubular secretion’ is the: (@ — Glomentlus. () Descending limb of Henle’s loop. (c) _ Distal convoluted tubule. (@ Proximal convoluted tubule. (9) __ Which one of the following statements is false with respect to an individual with ‘AB’ blood group? (@) Can receive blood fromall other blood groups. (b) Lacks ‘A’ and ‘B’ antigens. (©) Can donate blood to ‘AB’ blood group. (@)_ Lacks ‘A’ and ‘B’ antibodies, (x) The part of an eye involved in focusing of the image on the retina is the: (@)— Sclera (©) Ciliary body. (© Comea. @ — Choroid. (xi) Wilting of leaves occurs due to excessive (@) Transpiration. (b) Absorption of water. | (© Guttation @_—_ Imbibition. | | (xii) The genotype of a pea plant which is heterozygous for round seeds(R), and homozygous recessive for green seeds(y) is: (@) Ry. (b) RRyy. (0) RrYy. @ Rey. (xiii) Which one of the following functions will be affected if medulla oblon @ Vision. (b) Breathing. (©) Memory. (@) Muscular coordination,(xiv) Decrea Sed water content inthe plant leads to closure of stomata, Which one of the fe ollowing phytohormones stimulates thi stress adaptation? (®) Gibberetting ©) Cytokinins, ©) Abscisic acid (@)—Auxing &y) When Mende! cross-pollinated ure varieties of tall and dwarf plants, the offaprings in the FI generation were: (@) All dwarf plants, (©) Few dwarf plants (© No dwarf plants (4) Half of them were dwarf plants. Question 2 @ Name the following: (51 (2) The hormone that stimulates the release of glucose into the blood (©) A device used to demonstrate geotropic responses of plant parts. (©) The fluid present in the chamber anterior to the eye lens. (@) The tissue responsible for ascent of sap in plants. (©) Anorgan that produces urea. (i) Arrange and rewrite the terms in each group in the correct order so as to be in a logical sequence. 61 (a) Renal vein, Dorsal aorta, Posterior vena cava, Renal artery. (©) Earpinna, Auditory nerve, Bar ossiclés, Cochlea. © Plasmolysis, Hypertonic solution, Turgid cell, Exosmosis. (@) Association neuron, Effector, Sensory neuron, Motor neuron, (¢) Thrombus formed, Active Thrombin, Insoluble fibrin, Thromboplastin released. (Gi) Match the items given in Column I with the most appropriate ones in Column Il and rewrite the correct matching pairs. {51 Column T Column Ti (@)_ Crossing over. 1._Induces seed dormancy. (b) Adrenaline. 2. Banana. (©)_Imbibition 3._ Sister chromatids. @ Ethylene. 4, Surface attraction, (© Guttation, 3._Inereased heartbeat 6. Induces fruit pening. 7._ Variations in offspring. (iv) Choose the odd one out from the following terms and name the category to which the others belong. 181 (@) — Thalamus, Pons, Cerebrum, Hypothalamus, (©) Leucoplast, Tonoplast, Chloroplast, Chromoplast, (©) Haemoglobin, Melanin, fodopsin, Perilymph. (d) Peristalsis, Coughing, Playing a guitar, Swallowing, (©) Monocytes, Neutrophils, Basophils, Eosinophils, (¥) State the exact location of each of the following: (51 (@) Pituitary gland, (b) —Centromere (©. Macula lutea (@) Spleen, (©) Mitral valve.Section B (Attempt any four questions from this Section) Question 3 @ Deine Patse a (i) Expand cach of the fotlowing abbreviations: a a ACTH. : ’& NADP. (id) Give two points of difference between a simple and a conditioned reflex. a Gy) Which endocrine gland produces antidiuretic hormone? State a condition caused due to the hyposecretion of this hormone. al () Observe the diagram given below and answer the questions that follow: By —\ screen area Areaatfected by Starch Test (Blue Black) f Arca unaffected 7 byStarch Test Yetow Area (a) State the aim of the above experiment. (©) Define the process under study, (©) Represent the process mentioned in *b’ by means of a balanced chemical equation, Question 4 @ — Givean example to explain Thigmotropism in plants. wu Gi) Mention how the human eye adapts for vision in dim ight, eR) (ii) State one function of each of the following: eI (@) — Ampulla of the Semi-cireular canals. (b) Cerebrospinal fluid, (iv) Urine is generally thicker in sumer, Give reason. Ql (9) Given below is a schematic diagram of a part of the circulatory system. Observe ‘the same and answer the questions that follow: BI (a) Name the parts labelled as *2" and °° (b) Give one point of difference between structure of the parts labelled as *3" and “4°,Question 5 (Give the schematic representation of the pathway of a reflex are, uy) (Name the hormone causing each of the following conditio a (@) — Acromegaly. (©) Addison's disease. (Gi) Draw a neat and labelled diagram showing the structure of the Malpi jan capsule. (2) Focus in front of retina (iv) What is the significance of transpifation for the plant body? (21 (©) What is Phototropism? Explain the role of Auxins in phototropism. 1) Question 6 (@® Define: “Tropic hormone’. 1 (ii) Mature erythrocyte lacks a nucleus and mitochondria. Give reason, QI (ii) What is Genotype? Mention the genotypic ratio of the F2 generation in a monchybrid cross. 2 (iv) Write two points of difference between endocrine and exocrine glands. pI (¥) Study the diagram given below and answer the questions that follow: 1 Light ray fom far object (@) Identify the eye defect. (b) State one cause of the above-mentioned defect. (©) Draw aneat diagram to show how the above defect is rectified Question 7 @ Explain ‘Active transport” in plants, wy (@) Differentiate between spinal cord and cerebrum on the basis of the parameters mentioned below: RI (@) Distribution of eytons and axons of neurons. (©) Funetion. (ii) State any two functions of lymph, 2] (iv) What is the importance of Meiotic cell division? Ql (v) Observe the diagram given below and answer the questions that follow: BI (@) Name the parts labelled as ‘A’ and ‘B? ©) Renal medulla shows a striped appearance in its sectional view. Give reasonQuestion 8 (i) Differentiate between Sympathetic and Parasympathetic nervous system on the basis of their effect on the salivary glands. mn} (ii) Mention one function of each of the following hormones 2 (a) Thyroxine. (b) Glucocorticoids (ii) List wo characteristic features of the Telophase stage of mitotic cell division in an animal cell. mw (iv) Give biological terms for each one of the following: a (a) Audio receptor region of the Cochlea. (©) Splitting of water molecules in presence of light. (®) Observe the diagram given below and answer the questions that follow: BI (@) Identify the phase of the cardiac cycle shown in the diagram. (b) Give a reason to support the answer mentioned in (a) (c) What is the sound produced’ at the start of the above-mentioned phase? A EEE OEEE ESSE OOO OE EEE SSI EEE ARE SSE