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41.
The group of animals described as glorified reptiles is
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A.
Pisces
B.
amphibian
C.
Ayes
D.
Mammals
Explanation. Give a better Explanation
(C)


42.
The anal and dorsal fins of fish are usedfor
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A.
steering
B.
buoyancy
C.
upward movement
D.
controlling rolling movement
E.
downward movement
Explanation. Give a better Explanation
Pectoral and pelvic fins are moved independently and are used for steering and balancing and also for back and forward movement. (D)


43.
The significance of mitosis includes all of the following except
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A.
genetic stability
B.
growth
C.
cell replacement
D.
degeneration
Explanation. Give a better 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).


44.
Which of the following is absent in the prophase stage of meiosis?
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A.
leptonem
B.
zygonem
C.
pachynem
D.
triplonema

45.
The photosynthetic pigments include
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A.
chlorophyll and carotenoids
B.
chloroplasts and cytochromes
C.
melanin and heamoglobin
D.
carotenoids and haemoglobin
Explanation. Give a better 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)


46.
Which of the following produces both hormones and enzymes?
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A.
pancreas
B.
ileum
C.
gall bladder
D.
kidney
Explanation. Give a better Explanation
Pancreas produced insulin for sugar regulation and produce enzymes like pancreatic amylase, lipsin and pancreatic lipase (A).


47.
Of the following{} which one lacks chaetae{} tentacles and antennae?
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A.
snail
B.
earthworm
C.
millipede
D.
snake
Explanation. Give a better Explanation
Snake do not possess all the mentioned features (D)


48.
Etilolation is caused by the influence of
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A.
CO2
B.
water
C.
mineral salt
D.
HCI
E.
light
Explanation. Give a better 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).


49.
Epigeal animation can be found in
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A.
sorghum
B.
maize
C.
millet
D.
groundnut
Explanation. Give a better 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).


50.
_________ is not sex-linked.
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A.
Stunted growth
B.
river blindness
C.
haemophillia
D.
colour blindness
Explanation. Give a better Explanation
River blindness is caused by roundworm and other filarial worms (B)


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