Question

EXERCISE
How many pollen tubes emerge from a pollen grain?
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Que. 2 : What does the pollen tube carry ?
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Que. 3 : Can you explain as to why some pollen grains fail to germinate?
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Que. 4 : Why do we use sucrose as the medium for pollen germination ?
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Answer 1

Answer:

1..When fully hydrated, the pollen grain deposits callose, a β 1,3-glucan, at one of the three pores, where the pollen tube will emerge. Pollens normally germinate in stigmata of plants. In some plant groups they germinate in anther loculus (in situ).