ICSE Class 9 Biology
Question 7 of 12
Pollination and Fertilization — Question 11
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Question 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
Atul and Anaya
Reason — Cross-pollination is the transfer of pollen from the anther of one flower to the stigma of a flower on a different plant. Adaptations for cross pollination are: -
Herkogamy – Physical barrier between anther and stigma.
Heterostyly – Styles and stamens of different lengths in flowers.
Unisexuality – Male and female flowers on different plants.
Dichogamy – Anthers and stigma mature at different times.