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Sexual Reproduction in Plants

Pollen grains...

Question

Pollen grains of sunflower are

A

Tissue

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B

Organ

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C

Cell

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D

Organ system

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Solution

The correct option is C
Cell

Pollen grains are single cells in most flowering plants, but several cells in other plants. The male gamete is the pollen grain that is a tough-walled single cell with two nuclei .

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Similar questions

The organisms that help in the transfer of pollen grains are called _____.

The most resistant organic material present in the exine of pollen grains is:

Q. Name the organic material exine of the pollen grain is made up of. How is this material advantageous to pollen grain?

Q. Identify the pair of wrong statements.
I. Intine of pollen grains is made up of sporopollenin.
II. Pollen grains are well preserved as fossils because of the presence of sporopollenin.
III. Enzymes can degrade the organic material of the pollen grain exine.
IV. Sporopollenin can withstand high temperature, strong acids and alkali.

Q. (a) Name the organic material of the exine of the pollen grain. How is this material advantageous to pollen grain?
(b) Still, it is observed that it does not form a continuous layer around the pollen grain. Give reason.
(c) How are 'pollen banks' useful?

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