Biology
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
Pollination
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Answer
P — Entomophily, Q — Hydrophily, R — Anemophily
Reason — Flower of Hibiscus are large, colorful and scented which attracts insects, hence pollination is by insects (Entomophily).
Hydra is an aquatic plant so pollination happens via water (Hydrophily).
Flower of wheat are small, non-showy hence pollens are carried by wind (Anemophily).
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Which of these does not belong to the embryo sac of a flower?
- Generative nucleus
- Antipodal cells
- Polar Nuclei
- Synergids
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
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.
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.