BIOLOGY | Study Mode

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Question 42
A
steering 
B
buoyancy 
C
upward movement 
D
controlling rolling movement 
E
downward movement 
Explanation.
Share Answer Pectoral and pelvic fins are moved independently and are used for steering and balancing and also for back and forward movement. (D)

Correct Option:
D
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Question 43
A
genetic stability 
B
growth 
C
cell replacement 
D
degeneration 
Explanation.
Share Answer Mitosis takes place when cells divide during growth, development and also during asexual reproduction. Mitosis enhance generation stability but is not involved in cell replacement (C).

Correct Option:
C
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Question 45
A
chlorophyll and carotenoids 
B
chloroplasts and cytochromes 
C
melanin and heamoglobin 
D
carotenoids and haemoglobin 
Explanation.
Share Answer Haemoglobin is involved in blood circulation, Melanins are for skin colouration, cytochromes are not pigments involved in photosynthesis. The chloroplasts contain a mixture of several pigments, the main one being chiorophylls, caretenoids and xanthophyll (A)

Correct Option:
A
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Question 46
A
pancreas 
B
ileum 
C
gall bladder 
D
kidney 
Explanation.
Share Answer Pancreas produced insulin for sugar regulation and produce enzymes like pancreatic amylase, lipsin and pancreatic lipase (A).

Correct Option:
A
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Question 48
A
CO2 
B
water 
C
mineral salt 
D
HCI 
E
light 
Explanation.
Share Answer Light is required for photosynthesis and chlorophyll without which photosynthesis can not take place. A seedling grown in the dark becomes etiolated. It is yellow, due to lack of chlorophyll (E).

Correct Option:
E
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Question 49
A
sorghum 
B
maize 
C
millet 
D
groundnut 
Explanation.
Share Answer Epigeal germintaion is defined as the type of germination in which the cotyledons or seed leaves are carried above the soil surface. It is associate with dicotyledons like groundnut, cowpea and melon (D).

Correct Option:
D
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