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Exine in pollen grain in made up of...

Exine in pollen grain in made up of

A

pectocellulose

B

lignocellulose

C

sporopollenin

D

pollen kit

Text Solution

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The correct Answer is:
C
Exine is chiefly made upof sporopollenin. It discontinues or ruture ony by exine at some places (where sporopollenin absent). These placs are called pore, through which pollen tubes come out during germination on stigma.
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pollen grains

Exine of pollen grain

The exine of pollen grain is made up of a complex substance called__________ .

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

Pollen grain is

Pollen grain is

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.

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

Intine of pollen grain is made of

ARIHANT NEET-SEXUAL REPRODUCTION IN FLOWERING PLANTS -MEDICAL ENTRANCE EXAMS
  1. Which of the following is pollinated by water?

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  2. Which of the following statements about sporopollenin is incorrect ?

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  3. Exine in pollen grain in made up of

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  4. Ornithophily refers to the pollination by which or the following :

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  5. In some organisms, karyokinesis is not followed by cytokinesis as a re...

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  6. Which of the following floral parts forms pericarp after fertilization

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  7. Outer wall/exine of pollen grain is formed of

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  8. During formation of mature embryo sac from megaspore, the megaspore un...

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  9. One of the most resistant known biological material is

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  10. Male gametophyte of angiosperms is reduced to

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  11. One advantange of cleistogamy is

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  12. For good growth of pollen tube, necessary element is

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  13. Stalk with which ovules remain attached to placenta is called

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  14. The fertilisation in which male gametes are carried through pollen tub...

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  15. Which one of the following statements is not true?

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  16. There are 10 flowers in one individual plant of Crotalaria. In each mi...

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  17. The fusion of male and female pronuclei of the gametes is called

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  18. Embryo developed from the somatic cells are called

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  19. Endosperm is consumed by developing embryo in the seed of

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  20. Unisexuality of flowers prevents

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