Question

are all pollen tubes of equal length ?if not why?

Answer 1

Hey

Pollen tube :-

• The tube which penetrates style and goes through it and finally reaches at the ovary ( ovule " eggs " ) , that tube is known as pollen tube .

It's lenght is not same in different different flowers because :-

♦ The lenght of pollen tube depends upon the distance between stigma and ovary . This is not fixed for all the plants ( i.e this distance is nit same in case if every plants ) . So , the lenght of pollen tube also varies .


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Answer 2

Answer:

1)Some pollen grains fail to germinate as they don't get all the essential conditions for the germination of pollen.

2)No, pollen grains of other species do not grow.

3)Flowers receive all types of pollen which includes pollen of same species and of different flowers as well. This happens because of means of pollination i.e. butterflies, bees, wind etc. The stigma of flower receives different kinds of pollen, but pollen belonging to same species grows and survive and rest of the pollens fail to grow.  

4)No, pollen tubes are not of equal length. It is so because older germinated pollens will have longer developed tube as compare to newly germinated pollen which will have shorter pollen tube.

5)If pollen germinates on stigma, pollen tube will reach the stigma.

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