Biology
Assertion (A): Autogamy and allogamy are the two kinds of self-pollination.
Reason (R): Self-pollination occurs within the same flower or two flowers of the same plant.
- A is True and R is False.
- A is False and R is True.
- Both A and R are True.
- Both A and R are False.
Pollination
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Answer
A is False and R is True.
Reason — Autogamy is self-pollination, while allogamy is cross-pollination.
Self-pollination includes: Autogamy: Within same flower and Geitonogamy: In different flowers on the same plant.
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Related Questions
A biology teacher asked her students to mention two conditions that favour cross-pollination.
Atul said: Herkogamy and Heterostyly.
Ritu said: Bisexuality and self-sterility.
Rahul said: Homogamy and Herkogamy.
Anaya said: Unisexuality and Dichogamy.
Who were correct?
- Atul and Anaya
- Atul and Ritu
- Anaya and Rahul
- Ritu and Rahul
Look at the table given below and identify the kind of pollination that usually occurs in the flower mentioned.
Flower Kind of pollination Hibiscus P Hydrilla Q Wheat R - P — Entomophily, Q — Hydrophily, R — Anemophily
- P — Hydrophily, Q — Elephophily, R — Anemophily
- P — Ornithophily, Q — Anemophily, R — Elephophily
- P — Ornithophily, Q — Hydrophily, R — Entomophily
Assertion (A): Herkogamous flowers favour cross-pollination as these flowers have a structural barrier between the male and female reproductive parts.
Reason (R): Pansy is an example of a herkogamous flower which has a hood covering the stigma.
- A is True and R is False.
- A is False and R is True.
- Both A and R are True.
- Both A and R are False.
Assertion (A): Entomophilous flowers are not brightly coloured and often dull green in colour.
Reason (R): The pollinating agents of entomophilous flowers are usually water, wind and birds.
- A is True and R is False.
- A is False and R is True.
- Both A and R are True.
- Both A and R are False.