Biology - 1997 (I.C.S.E)
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questions 3 to 7 |
Section-II
Q 3 (a) (i) Draw a neat labeled
diagram of the apparatus you would set up to show that oxygen is
given out during photosynthesis.
(ii) Give the overall equation
to represent the process of photosynthesis.
Q 3 (b) Write briefly as indicated
in the brackets on the following :
(i) Myopia (Symptom and
Cause)
(ii) Penicillin (Source and Function)
(iii) Red Blood
Corpuscles (Origin and Function)
(iv) Tympanum (Location and
Function)
(v) Mitochondria (Structure and Function)
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Q 4 (a) The figure alongside shows an experiment
performed on germinating seeds. Study the same and then answer
the question that follow :
(i)What is the aim of the
experiment?
(ii)Write the chemical equation for the process
mentioned in Q (i) above.
(iii)Draw a neat labeled diagram
of the apparatus as it would appear after 24 hours.
(iv)The
soaked seeds used in the experiment their seed coats removed.
Give a reason for the same.
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 | Q 4
(b) Answer briefly the
following question:
(i)Why are capillaries thin
walled?
(ii)Mention two functions of the choroid coat in the
eye.
(iii)What is meant by gestation period?
(iv)What is the
effect of shivering?
(v)What is meant by photolysis of
water?
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Q 5 (a)
Given below is the simplified pathway of the circulatory system of
man :-
(i) Name the blood vessels
marked 1 to 8.
(ii) Name the chamber of the heart which :-
1.
receives blood from '1',
2. pumps blood into blood vessel
'8'.
(iii) Mention two structural differences between blood
vessels '7' and '2'.
Q 5 (b)
(i) Define transpiration.
(ii)
Describe an experiment to prove that transpiration occurs more from
the under surface of dorsiventral leaves.
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Q 6 (a) The
figure alongside is the structure of a cell :
(i) Label the parts
A to I as indicated by guidelines.
(ii) Is it a plant cell or an
animal cell ? Give one reason to support your answer.
(iii) Is
the cell shown, turgid or flaccid?
Q 6 (b) Give appropriate terms for the following :
(i) A
membrane that surrounds the foetus and secretes a protective
fluid.
(ii) Protective coverings of the brain and spinal
cord.
(iii) A statistical study of human population.
(iv)
Substances that are applied to the surroundings where germs thrive
and and multiply.
(v) The inward movements of solvent
molecules through the plasma membrane of a cell.
(vi) Loss of
water in the form of droplets from the margin of a leaf.
(vii)
Adjustment of the eyes in the order to obtain a clear vision of
object at different distances.
(viii) The small amount of inhaled
air in the respiratory tract that does not take part in gaseous
exchange.
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Q 7
Explain briefly the idea contents in any five of the following
statements :
(i) Oxygen given out
during photosynthesis comes from water.
(ii) The need to limit
the size of family is more vital today than ever before. Give two
reasons.
(iii) Root hairs becomes flaccid , when fertilizer are
added to the moist soil around it.
(iv) Transplanting of
seedlings to a flower bed in the evening is better than doing so in
the morning.
(v) In summer urine is slightly thicker than in
winter .
(vi) The man can live without food for a number of days
but he can not survive without Oxygen for more than a few
minutes.
(vii) Environmental pollution is a recent problem . Do
you agree ? Give two reasons to support your answer.
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