Q7 of 53 Page 12

Name the parts of pistil which develop into fruit and seeds.

stigma, style and ovary

Explanation:



The parts of pistil are stigma, style and ovary.


- The stigma serves as a landing platform for pollen grains.


- The style is the elongated slender part beneath the stigma.


- Ovary has ovarian cavity in it, which in turn has placenta. From placenta ovules (or megasporangia) arise.


Ovary develops into fruits and ovules mature into seeds.


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Indicate the stages where meiosis and mitosis occur (1, 2 or 3) in the flow chart.

Megaspore mother cell →Megaspores → Embryo sac →Egg


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In the diagram given below, show the path of a pollen tube from the pollen on the stigma into the embryo sac. Name the components of egg apparatus.


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In case of polyembryony, if an embryo develops from the synergid and another from the nucellus which is haploid and which is diploid?

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Can an unfertilised, apomictic embryo sac give rise to a diploid embryo? If yes, then how?