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Anemophily Entomophily Hydrophily MCQs Class 12 Biology:

1. What is the term for pollination by insects in flowering plants?
a) Zoophily
b) Chiropterophily
c) Anemophily
d) Entomophily
Answer: d
Explanation: Entomophily refers to pollination by insects. Zoophily is pollination by animals, anemophily by wind, and chiropterophily by bats.

2. Why was a normal pollen tube still formed even after the generative cell was destroyed by laser?
a) Laser beam stimulates growth of pollen tube
b) Region of emergence is not harmed
c) Vegetative cell is not damaged
d) Contents of killed generative cell stimulate pollen
Answer: c
Explanation: The vegetative cell controls pollen tube formation. Since it remains intact, the pollen tube develops normally even if the generative cell is destroyed.

3. What is xenogamy in flowering plants?
a) Same plant different flower
b) Parthenocarpy
c) Same flower
d) Different plants
Answer: d
Explanation: Xenogamy is pollination between flowers of different plants of the same species.

4. What type of pollination does the corolla in passion flower help achieve?
a) Bat
b) Bird
c) Wind
d) Insect
Answer: d
Explanation: Bright and attractive corolla attracts insects, leading to insect pollination.

5. Sage flower is pollinated by:
a) Aphids
b) Butterflies
c) Bees
d) Moths
Answer: c
Explanation: Sage flowers attract bees due to color and fragrance.

6. At the time of pollination, pollen grain of Pinus are:
a) One celled
b) Two celled
c) Three celled
d) Four celled
Answer: d
Explanation: Pinus pollen has two prothallial cells, one generative cell, and one tube cell.

7. Flower pollinated by wind is characterized by:
a) Small, non-scented, colourless flowers
b) Big, scented flowers
c) Big coloured flowers
d) Big non-scented flowers
Answer: a
Explanation: Wind pollinated flowers do not need attraction, so they are small and dull.

8. Type of pollination in Commelina is:
a) Chasmogamy
b) Geitonogamy
c) Xenogamy
d) Cleistogamy
Answer: d
Explanation: Cleistogamous flowers never open and self-pollinate.

9. Pollination within same flower is called:
a) Geitonogamy
b) Xenogamy
c) Autogamy
d) Apogamy
Answer: c
Explanation: Autogamy occurs within the same flower.

10. Anemophily is found in:
a) Salvia
b) Bottle brush
c) Vallisneria
d) Coconut
Answer: d
Explanation: Coconut is wind pollinated.

11. Pollination in Calotropis is:
a) Dicliny
b) Herkogamy
c) Heterostyly
d) Dichogamy
Answer: b
Explanation: Herkogamy prevents self-pollination by spatial separation.

12. Correct sequence:
a) Anthesis → Meiosis → Pollination → Syngamy
b) Pollination → Meiosis → Anthesis
c) Anthesis → Pollination → Meiosis
d) Meiosis → Pollination → Anthesis
Answer: a
Explanation: Meiosis forms gametes, anthesis opens flower, pollination then fertilization.

13. Why is autogamy avoided?
a) Few seeds
b) Poor germination
c) Weak plants
d) All
Answer: d
Explanation: Self-pollination reduces genetic diversity and vigor.

14. Correct statements:
a) A & B
b) A & C
c) A & D
d) C & D
Answer: d
Explanation: Xenogamy = different plant; Geitonogamy = same plant different flower.

15. Barrier preventing pollination is called:
a) Heterostyly
b) Herkogamy
c) Dichogamy
d) Cleistogamy
Answer: b
Explanation: Herkogamy physically separates stigma and anther.

16. Pollination by bats is:
a) Anemophily
b) Hydrophily
c) Ornithophily
d) Chiropterophily
Answer: d
Explanation: Chiropterophily = bat pollination.

17. Gymnosperms show:
a) Anemophily
b) Zoophily
c) Entomophily
d) Hydrophily
Answer: a
Explanation: Wind pollination is common.

18. Jaculators found in:
a) Ruellia
b) Impatiens
c) Ecballium
d) None
Answer: a
Explanation: Ruellia disperses seeds using jaculators.

19. Autogamy example:
a) Viola
b) Cicer
c) Triticum
d) Ricinus
Answer: a
Explanation: Viola shows cleistogamy.

20. Pollination by snails:
a) Entomophily
b) Ornithophily
c) Anemophily
d) Malacophily
Answer: d
Explanation: Snail pollination is malacophily.

21. Incorrect for cross-pollination:
a) Male to female
b) Different plants
c) Same plant flower
d) Same flower
Answer: d
Explanation: Same flower = self-pollination.

22. Placentation in Nymphaea:
a) Parietal
b) Superficial
c) Marginal
d) Basal
Answer: b
Explanation: Ovules develop on inner wall.

23. Allogamy occurs in:
a) Unisexual flowers
b) Neuter
c) Underground
d) None
Answer: a
Explanation: Requires separate male & female flowers.

24. Entry through integuments:
a) Chalazogamy
b) Mesogamy
c) Porogamy
d) Siphonogamy
Answer: b
Explanation: Mesogamy = through integuments.

25. Small dull flowers indicate:
a) Chiropterophily
b) Entomophily
c) Anemophily
d) Ornithophily
Answer: c
Explanation: Wind pollinated plants.

26. Characteristic of anemophily:
a) Small dull flowers
b) Bright flowers
c) Bird pollination
d) Sticky pollen
Answer: a
Explanation: Wind pollination traits.

27. Gloriosa shows:
a) Heterostyly
b) Cleistogamy
c) Self sterility
d) Herkogamy
Answer: d
Explanation: Spatial separation prevents selfing.

28. Same pollinating agent:
a) Triticum group
b) Cannabis group
c) Salvia, Calotropis, Rafflesia
d) Mixed
Answer: c
Explanation: All insect pollinated.

29. Malacophily seen in:
a) Zostera
b) Lemna
c) Ruppia
d) Bignonia
Answer: b
Explanation: Lemna is snail pollinated.

30. Fig trees pollinated by:
a) Air
b) Bats
c) Birds
d) Wasps
Answer: d
Explanation: Fig–wasp mutualism is highly specific.