Previous Year Paper year:2011 : ICSE-X-Biology

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ICSE-X-Biology

Previous Year Paper year:2011

with Solutions - page 3

#1-f-ii
The blood vessel which begins and ends in capillaries is the .....
Ans : Phenotype is the observable characteristic which is genetically controlled.

#1-f-iii
Wooden doors swell up in the rainy season due to .....
Ans : Wooden doors swell up in rainy season due to imbibition.

#1-f-iv
Phenotype is the observable characteristic which is .... controlled.
Ans : The blood vessel that begins and ends in capillaries is the hepatic portal system.

#1-f-v
...... vaccine is given to build up immunity against polio.
Ans : Plasmolysis is the phenomenon of contraction of the cytoplasm hern cell wall.

#1-g [5]
Study the following diagram carefully and answer the questions which follow:

#1-g-i
Name the cell 1.
Ans : 1-Red blood cells.

#1-g-ii
What phenomenon is occurring in A?
Ans : Diapedesis

#1-g-iii
Mention two structural differences between 1 and 2.
Ans :

1 2

(a) Biconcave in shape
(b.) Nucleus absent
Amoeboid in shape
Nucleus present

#1-g-iv
Name the process occurring in B and C and state the importance of this process in
the human body.
Ans : Phagocytosis Process. By this process the WBC engulfs the diseases causing germs that enter the body and thus defend our body.

#1-h [5]

Match the items in Column I with that which is most appropriate in Column II.

Column I	Column II
(1) Pacemaker	(a) Associated with static body balance
(2) Stroma	(b) Chordae tendinae
(3) Afferent nerve	(c) Site of light reaction
(4) Prolactin	(d) Motor neuron
(5) Sacculus	(e) SA node
	(f) Stimulates production of milk by the mammary gland
	(g) Site of dark reaction
	(h) Transmits impulses from receptor organ to spinal cord
	(i) Secreted by anterior lobe of pituitary gland
	(j) Transfers impulses from spinal cord to muscles

Ans :

Column 1	Column II
(1) Pacemaker	(e) S A node
(2) Stroma	(c) Site of light reaction
(3) Afferent nerve	(h) Transmits impulses from receptor organ to spinal cord.
(4) Prolactin	(f) Stimulates production of milk by the mammary gland
(5) Saccules	(a) Associated with static body balance

# [40]
Section : II
Attempt any four questions from this section.

#2 [10]

#2-a
Study the diagram given below and answer the following questions:

#2-a-i
Name the region in the kidney where this structure is present.
Ans : Cortex

#2-a-ii
Name the parts labelled 1, 2, 3 and 4.
Ans : 1 - Afferent arteriole
2 - Glomerulus
3 - Bowman's capsule
4 - Efferent arteriole