Home
Class 12
BIOLOGY
(A) : Exine of pollen is chiefly made up...

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

A

If both (A) and (R) are true and (R ) is the correct explanation of (A)

B

If both (A) and (R) are true but (R ) is not the correct explanation of (A)

C

If (A) is true but (R) is true

D

If both (A) and (R) are false.

Text Solution

Verified by Experts

The correct Answer is:
c
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • REPRODUCTIVE HEALTH

    GRB PUBLICATION|Exercise Assertion -Reason Type Questions|36 Videos

  • REPRODUCTION IN ORGANISMS

    GRB PUBLICATION|Exercise EXEMPLAR PROBLEMS|33 Videos

  • SEXUAL REPRODUCTION IN FLOWERING PLANTS

    GRB PUBLICATION|Exercise NCERT Corner|23 Videos

Similar Questions

Explore conceptually related problems

The outer layer of pollen is made up of :

Fill in the blanks : B. ……… of pollen grains is made up of sporopollenin.

Knowledge Check

  • ‘Pollen kitt’ is chiefly made up of :

    A
    Chlorophylls
    B
    Lipids
    C
    Carotenoids
    D
    Both (2) and (3)

  • Exine in pollen grain in made up of

    A
    Pectocellulose
    B
    Lignoscellulose
    C
    sporopollenin
    D
    pollen kit

  • The intine of a pollen grain is mainly made up of

    A
    cellulose and pectin
    B
    lipid and pectin
    C
    pectin and lignin
    D
    lignin and cutin

    • Similar Questions

    Explore conceptually related problems

    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.

    Pollen tube is made up of

    Chemically the pollenkit is made up of

    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

    Consider the following statements with respect to pollen grains (a) Exine is thin, continuous layer made up of cellulose and pectin (b) Hard outer layer called exine is made of sporopollenin (c) Sporopollenin is present in germ pores (d) Exine exhibits a fascinating array of patterns and designs. Of the above statements

    Home
    Profile