Sexual Reproduction in Flowering Plants( Flower structure; Development of Male and Female Gametophytes; Pollination-types, Agencies...) NEET Questions

Biology - Reproduction

Sexual Reproduction in Flowering Plants( Flower structure; Development of Male and Female Gametophytes; Pollination-types, Agencies...) MCQ Questions


13.
The two cells of a pollen grain at the time of shedding (2-celled stage) are:
A.
Vegetative cell and tube cell
B.
Two male gametes
C.
Tube cell and stalk cell
D.
Vegetative cell and generative cell
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ANSWER :
D. Vegetative cell and generative cell
14.
Pollen viability after release depends on:
A.
Light only
B.
Temperature and humidity
C.
Wind speed only
D.
Soil pH
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ANSWER :
B. Temperature and humidity
15.
Pollen grains can be preserved for years in:
A.
Liquid nitrogen at -196°C
B.
Dry ice at -78°C
C.
Refrigerator at 4°C
D.
Boiling water at 100°C
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ANSWER :
A. Liquid nitrogen at -196°C
16.
Sporopollenin is found in:
A.
Intine of pollen grain
B.
Cell wall of tapetum
C.
Exine of pollen grain
D.
Pollen tube wall
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ANSWER :
C. Exine of pollen grain
17.
Megasporogenesis is the process of formation of:
A.
Embryo sac from megaspore
B.
Egg from megaspore
C.
Ovule from nucellus
D.
Megaspores from megaspore mother cell
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ANSWER :
D. Megaspores from megaspore mother cell
18.
In a typical angiosperm ovule, how many megaspores are functional?
A.
4
B.
2
C.
1
D.
3
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ANSWER :
C. 1