Same chapter3 marksDifficulty: Medium
State three adaptations of an insect-pollinated flower.
Pollination and Fertilisation
3 marksDifficulty: Medium
Describe the process of fertilisation in a flowering plant.
Original Khojo Papers practice question — not from a past board paper.
Answer
A pollen grain landing on a compatible stigma germinates and puts out a pollen tube that grows down the style, carrying two male gametes. The tube enters the ovule through the micropyle and releases the gametes. One fuses with the egg cell to form the zygote and the other with the polar nuclei to form the endosperm. The ovule then becomes the seed and the ovary the fruit.
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
The fusion of two gametes at two places is called double fertilisation.
Related questions
From the same topic and chapter, at a similar level.
Same chapter3 marksDifficulty: Medium
State two advantages and two disadvantages of self-pollination.
Pollination and Fertilisation
Same chapter3 marksDifficulty: Medium
Name three contrivances by which plants avoid self-pollination.
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Same chapter3 marksDifficulty: Medium
State three adaptations of a wind-pollinated flower.
Pollination and Fertilisation
Same chapter2 marksDifficulty: Easy
Define pollination and distinguish between self-pollination and cross-pollination.
Pollination and Fertilisation
Same chapter2 marksDifficulty: Easy
State two adaptations of a wind-pollinated flower.
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