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Question

A generative cell wall was destroyed by laser but later a normal pollen tube still formed. This probably occured because -

A
Vegetative cell was not damaged
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B
Contents of killed generative cell stimulate pollen growth
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C
Laser beam stimulates growth of pollen tube
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D
The region of emergence of pollen tube is not harmed
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Solution

The correct option is A Vegetative cell was not damaged
In the scenario given, a generative cell wall was destroyed by laser but a normal pollen tube still formed as the vegetative cell was not damaged. Each microspore divides by mitotic division making a smaller generation cell and a larger vegetative cell or tube cell. If the generative cell was damaged then a normal pollen tube will still form because it is formed by the vegetative cell not by the generative cell.

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