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Sexual Reproduction In Flowering Plants

Question
CBSEENBI12002867
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Which of the following has proved helpful in preserving pollen as fossils?

  • Pollenkitt

  • Cellulosic intine

  • Sporopollenin

  • Oil content

Solution

C.

Sporopollenin

Sporopollenin cannot be degraded by the enzyme; strong acids and alkali, therefore it is helpful in preserving pollen as fossil.

Pollenkitt – Help in insect pollination.

Cellulosic Intine – Inner sporoderm layer of pollen grain known as intine made up cellulose & pectin.

Oil content – No role is pollen preservation.

Some More Questions From Sexual Reproduction in flowering Plants Chapter

The entry of pollen tube into embryo sac through the integuments is termed as :

512 microspores will be formed following meiosis of how many microspore mother cells.

Pollination by water occurs in :

In ................... flowers, the thalamus grows upwards completely enclosing the ovary, and the stamens, petals and sepals are borne above the ovary.

In Calotropis, all the microspores of anther lobe remain united to form

Albuminous seeds store reserve food materials in ....................

Transfer of pollen grains from the anther to the stigma of another flower of same plant is called..............................

The...................direct the growth of pollen tube towards egg apparatus by secreting some chemical substances.

A kind of reproduction in which the new individuals are formed without involvement of meiosis and syngamy.

A kind of self-pollination in which the pollens from the anthers of one flower are transferred to the stigma of another flower borne on the same plant.

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