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At which cellular stage , does the polle...

At which cellular stage , does the pollen grains are usually liberated from the anther

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2 celled stage
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At which cellular stage , does the pollen grains are usually liberated from anther ? What happens to the generative cell if the pollen reaches the stigma ?

Generally the pollen grains are liberated from anther at ........

which cell develops into pollen grain? Where it develops?

During the process of fertilisation the pollen tube of the pollen grain usually enters the embryo sac through

At which stage of mitosis, the two daughter chromatids separate from each other, migrate towards the opposite poles and are now referred to as chromosomes of the future daughter nuclei?

In which part of the flower germination of pollen grains takes place ?

Science which deals with study of pollen grains ……….. .

(i) In 60% of the Angiosperms pollen is liberated in 3 celled stage. (ii) The pollen on reaching the stigma absorbs moisture and swells. (iii) Exine grows as pollen tube. (iv) Microspore is a diploid cell.

SURA PUBLICATION-ASEXUAL AND SEXUAL REPRODUCTION IN PLANTS-Answer in one word
  1. An oily layer found on pollen surface …….. .

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  2. Name the first cell of male gametophyte of a lowering plant ………… .

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  3. At which cellular stage , does the pollen grains are usually liberated...

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  4. Cavity in the ovary which bears the ovules …………… .

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  5. Another name for megasporangium in a flowering plant ……………. .

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  6. Stalk of the ovule …………. .

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  7. Tissue found in the ovule ……………. .

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  8. Protective coverings of a ovule …………… .

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  9. Female gametophyte in a flowering plant ………… .

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  10. An ovule which bears horse shoe shaped nucellus …………. .

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  11. Common type of ovule found in majority of the plants ……….. .

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  12. Number of cells and nuclei found in a embryo sac ………. .

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  13. Pollination which occurs without opening of flowers ………… .

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  14. Maturation of anther and stigma at different times …………… .

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  15. Pollination by birds ……………..

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  16. Pollination with the help of wind is called .

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  17. Pollination by animals ……….. .

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  18. Pollination by water …………. .

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  19. Pollination by bats …………. .

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  20. Another name for cross pollination …………. .

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