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Question
Pollen grain of Cycas are shed at stage of
Pollen grain of Cycas are shed at stage of
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Solution
The correct option is C Three - celled
Pollen grain is the first cell of the gametophyte. The microspore germinates in situ i.e., while within the microsporangium. Each microspore divides asymmetrically into a 2-cells: a smaller prothallial cell and a larger antheridialcell. The prothallial cell does not divide further while the antheridial cell divides into a smaller generative cell near the prothallial cell and a larger tube cell. Finally pollination takes place at 3-celled stage.
Pollen grain is the first cell of the gametophyte. The microspore germinates in situ i.e., while within the microsporangium. Each microspore divides asymmetrically into a 2-cells: a smaller prothallial cell and a larger antheridialcell. The prothallial cell does not divide further while the antheridial cell divides into a smaller generative cell near the prothallial cell and a larger tube cell. Finally pollination takes place at 3-celled stage.
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