NAME fPalok

THE BGES
12B, HEYSHAM SCHOOL (ICSE)
ROAD, KOLKATA- 700020
PRELIMINARY EVALUATION 2023-24
DATE:12.01.2024 CLASS 10
BIOLOGY MM:80
SCIENCE paper -3
Maximum Marks: 80
Time allowed: Two hours
Answers to this Paper must be written on the paper provided separately.
You will not be allowed to write during first 15 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 qucstions arc given in brackeis

SECTION A
(Attempt all questions from this Section.)
Question 1
Choose the correct answers to the questions from the given options.
Do not copy the question, write the correct answers only.)

i) Sterilisation in the females involves cutting and tying ofthe

(a) Uterus

(b) Uret:r

(c Ovi luct
(d) Blad der

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 (ii) Darwin explained origin of species through

(a) Mutation
(b) Acquired character

(c) Natural selection

(d) Hybridisation

iii) A gardener wants to eradicatc some weeds growing in some pas

of the garden. Excessive salts are sprinkled around their base.

The weeds die. This is due to

(a) Osmosis

(b) Guttation
(c) Pressure

(d) Plasmolysis

The cranial capacity of modern man is

(iv)
(a) 650 800 cc

(b) 1300 1600 cc

(c) 800-1300 cc

(d) 600 cc

(v) The idea of survival of fittest was first given by :

(a) Mendel

(b) Da win

(c) La narck

(d) Spencer
 takes place in
(vi) Assertion (A): Light dependent phase of photosynthesis
green leaves.
Reason (R): I1 takes place in grana of chloroplast.
Both A and R are tne
(a)
Both A and R are false
(b)

(c) A is true and R is false

(d) A is falsc and R is true

in humans:
(vii) The number of spinaB nerves

(a) 12 pairs

(b) 23 pairs

(c) 31 pairs

(d) 10pairs

Percentage of water in n o r m a l human urine

(viii)
roil
(a) 95%

(b) 70%
(c) 50%

(d) 20%

(ix) The nephrons discharge their urine at the:

(a) Urinary bladder

(b) Urethra

(c) Renal pelvis

(d) Rer al pyramid

 (x) Distance objects appear blurred in case of:

(a) Hyperopia
(b) Presbyopia
(c) Myopia
(d) Squint

The space between the cell wall and the plasma membrane is filled with
(xi)
(in a plasmolysed ccll):
(a) Isotonic solution

(b) Hypotonic solution

(c) Hypertonic solution

(d) Water

(xii) The process of photosynthesis occurs by:

(a) Carbon dioxideand water.

(b) Carbon dioxide, chlorophyll and water

(c) Water, chlorophyll, sunlight

(d) Water, carbon dioxide, chlorophyll and sunlight

rate of transpiration from a plant decreases. Which of the

(xiii) During monsoon the
following reasons causes this?

P. Wind
Q ge of the plant

R. F umidity

(a) Cnly P

(b) Only Q
(c) Only P and R

(d) Only Q and R

 (xiv) The cochlear canal is filled with this fluids
(a) Fndoly mph
(b)
Perilymph
(c)Pericantial fluid
d) Plasma

(x)
Ajay plays his guitar fora small period of time. Which of the following are
nvolved?

Cerebellum
Skeletal muscles
Glucose
Medulla oblongata

Oaly 3
b) Only I and 3

(c)Only 1.3 and 4

(d) Only 1.2 and 3

Question 2
Name the following:

(a) The state ofa cell when it can absorb no more water.

(b) The photosensitive pigment present in the rod cells in the retina.

tir
persons per square kilometer at any place on given
Number of a
(C)

(d) The movemen of the growth of the shoot towards the light.

(e One gaseous ccmpound which depletes the ozone layer.

 Arrange and rewrite the terms in each group in the correct order so as to be in a
(11)
the term that is
logical sequence beginning with undcrlined.

cranium, arachnoid
(a) Scalp, dura mater, pia mater,
canal
(b) Cochlea,tympanum, Pinna ,ossicles.auditory
(C)Synapse, axon endings, cyton, node.of Ranvier, Dehdrite
(d) Guard cells. stoma, cell wall, nucleus, chloroplast
(e) DNA, chromosomes, cell, nucleosomes, chromatin fibre

(iii) Fill in the blanks with suitable words:

A pair of (a) arteries branch off from the dorsal (b) to enter the

respective kidneys. Each artery gives rise to an arteriole which enters a (C)_

capsule under the name of (d) arteriole which breaks upinto a

number of capillaries to form a knot-like mass called(e)a
(iv) Choose the odd one out from the following terms and name the category to which

the others belong:

(a) Detergents, X- rays, sewage, oil spills.

(b) Ovary, fallopian tube, urcter, uterus

(c) Adrenaline, auxin, insulin, thyroxine

(d) Urea, carbolic acid, creatinine, uric açid

(c) Larynx, pancreas, testis, ovary

ones in Column II and

I with the most appropriate
Mat h the items given in Column
(V
rewite the correct matching pairs.
Column II
Column I
. Yellow fluid afier clotting
('1) Overpopulation

2. Under secretion £om pituitary

b) Dorsal aorta

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 (c) Serum 3. Low level of health

(d) Dwarfismn 4. Left ventricle of heart

5. Right ventricle of heart

(e) Plasma
6. Good level of health

7. Liquid portion of blood

SECTIONNB

(Attempt any four questions from this Section.)

Question 3

)
Dissimilar alleles for a particular character are carried by a pair of chromosomes. [
Name the term for the chromosomes.

(ii) State Mendel's Law of Independent Assortment 2

21
(iii) What is a parthenocarpy?

Differentiate between light reaction and dark reaction 12)

(iv)
having four 131
(v) Draw a neat, labeled diagram of an animal cell in anaphase stage
chromosomes.

Question 4
Give the exact location of the aortic valve.
2]
i) Name the two major divisions of the nervous system.
Differentiate between mortality and natality. [2
(i)
(iv) List two reasons for the population explosion inIndia. 21

Draw a neat, labelled diagram of a sperm.

[3
(v)

Question 5

Explein the term Corpus callosum.

-

2
in a scrotum?
(ii) What is the significance of testes 2
water. What will be the
observation and why?
(ii) A me rine fish was kept under tap

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 of bacteria. 121
in the proliferation
ponds and lakcs which help
to the ncarby
(iv) A are washed
the death of fish,
resulting in
water
h e s e bacteria consume a lot of oxygen from
B.
animals which is called B. Identify A and
aquatic plants and

follow:
13
below and answer the questions that
(v) Study the diagram given

defect.
(a) Nam the scientific term for the

What is the reason for the defect?

(b)
it be corrected?
(c) How can

Question 6

Give the exact location of SA node.

and Pulmonary vein on the basis of their (21

between Pulmonary artery
i) Differentiate
function.
(21
Mention two causes of air pollution.
ii)
21
What is Vasectomy and Tubectomy.
iv)

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 (v)
Study the diagram given below and answer the questions that follow:
131

(a) What aspect of the

physiological process is being examined?
(b) Explain the above
process.

c) Label the parts 1 and 2( inside

the apparatus)
Question 7

What is semen?

(ii) Give two physiological effects of Auxins.

12
(iii) State any two differences between
Neanderthal man and Cro magnon man 21
iv) Mention the secretions of alpha cells and beta cells of pancreas.
2

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 (v) d y the picture given below and answer the questions that follow

EDn

Coces
Ovwndow

(a) Give the biological term for part labelledA and state its function?

(b) Name the parts labelled Band C

(c) What is the function of ear wax?

Question 8
Define Diastole.
Mention the chromosome number of the egg and zygote in

(ii) Mention components of Purines and

humans 12
Pyrimidines. 21
(iv) State any two objectives of Swatch Bharat Abhiyan. (2

(v) Study the diagram and answer the questions that follow:
[3

(a) Name the liquidentering part1.

Name the st ucture represented in the diagram
(b)
2.
(c) Name the ma in nitrogenous waste in the fluid of part

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