BIOLOGY | Study Mode

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Question 41
A

Pisces

B

amphibian

C

Aves

D

Mammals

Explanation

Birds have often been called "glorified reptiles". Although the birds are grouped as a separate vertebrate class "Aves", apart from the power of flight and features which are connected with it, they are structurally similar to reptiles.(C)


Correct option: C
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Question 42
A
steering
B
buoyancy
C
upward movement
D
controlling rolling movement
E
downward movement
Explanation
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
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 44
A
leptonem
B
zygonem
C
pachynem
D
triplonema
Explanation

Correct option: B
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Question 45
A
chlorophyll and carotenoids
B
chloroplasts and cytochromes
C
melanin and heamoglobin
D
carotenoids and haemoglobin
Explanation
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
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 47
A
snail
B
earthworm
C
millipede
D
snake
Explanation
Snake do not possess all the mentioned features (D)

Correct option: D
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Question 48
A
CO2
B
water
C
mineral salt
D
HCI
E
light
Explanation
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
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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Question 50
A
Stunted growth
B
river blindness
C
haemophillia
D
colour blindness
Explanation
River blindness is caused by roundworm and other filarial worms (B)

Correct option: B

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