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Introduction to Angiosperms

The most resi...

Question

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

A

Cuticle

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B

Suberin

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C

Sporopollenin

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D

Dipicolinic acid

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Solution

The correct option is C
Sporopollenin

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

Q. Choose the correct statement(s) regarding pollen grains.
I. Pollen grains are the male gametes of the flowering plant.
II. Pollen grain has a prominent two-layered wall.
III. The outer thick wall of pollen grain is called exine and the inner thin wall is called intine.
IV. The hard outer layer called the exine is made up of sporopollenin which is one of the most resistant organic materials known.

Q. Two mark Questions:
Name the organic materials the exine and intine of an angiosperm pollen grains are made up of. Explain the role of exine.

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(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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