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Absorption of Carbohydrates

Sporopollenin...

Question

Sporopollenin an organic material is present in

A

Exine

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B

Intine

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C

Stigma

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D

Style

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Solution

The correct option is A
Exine

Exine is thick, sculptured and smooth. It is cuticularised and the cutin is made of a special type calledsporopollenin, which is resistant to the chemical and biological decomposition.

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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.

Q. [A]: Microspores or pollen grains are safely deposited in the fossils
[R]: Pollen grains have sporopollenin in their intine

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.

Exine and intine are the parts of
(a) Embryo sac
(b) Pollen grain
(c) Stigma
(d) Seed

Q. Identify the pair of wrong statements in the following.
I) Intine of pollen grain 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 exine of pollen grain.
IV) Sporopollenin can withstand high temperatures, strong acids and alkali.

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