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Assertion : Exine of a pollen grain is m...

Assertion : Exine of a pollen grain is made up of sporopollenin which is resistant to high temperature, strong acid or alkali as well as enzymatic degradation.
Reason : Sporopollenin is absent in the region of germ pores.

A

If both assertion and reason are true and reason is the correct explanation of assertion

B

If both assertion and reason are true but reason is not the correct explanation of assertion

C

If assertion is true but reason is false

D

If both assertion and reason are false

Text Solution

Verified by Experts

The correct Answer is:
b
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Fill in the blanks : B. ……… of pollen grains is made up of sporopollenin.

In pollen grains where sporopollenin is absent called germ pore.

Knowledge Check

  • A chemical compound which is resistant to strong acid, alkali and enzymatic degradation is present in the

    A
    Endothecium cells of anther wall
    B
    Cytoplasm of nucellus cells
    C
    Sporoderm of pollen grains
    D
    Seed coat of castor seeds

  • The exine of pollen grain is made up of .........and has germ pores :-

    A
    Sporopollenin
    B
    Pectin
    C
    Cellulose
    D
    2 & 3 both

  • Assertion :- Pollen grainscan withstandhigh temperature and strong acids and alkali. Reason-Theirnnehrarldayeirn tinisemaduep of sporopollenin

    A
    A
    B
    B
    C
    C
    D
    D

    • Similar Questions

    Explore conceptually related problems

    (A) : Exine of pollen is chiefly made up of sporopollenin. (R): Sporopollenin is chemically a polymer of fructose.

    Sporopollenin in exine of pollen grain can be degraded

    Sporopollenin in exine of pollen grain can be degraded by

    Identify the pair of wrong statements I. Intine of pollen grains is made up of sporopollenin, II.l 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

    Assertion (A): Pollen grains are best preserved as fossils. Reason (R) : The sporopollenin of exine is highly resistant to the action of strong acids and alkali and can withstand a high temperature.

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