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Sexual Reproduction In Flowering Plants

Question
CBSEENBI12047307
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Xenogamy is essentially a type of

  • cleistogamy

  • allogamy

  • autogamy

  • homogamy

Solution

B.

allogamy

Xenogamy is true cross-pollination, i.e., allogamy which involves the transfer of pollen grains from the anther of one plant to the stigma of another, genetically dissimilar plant.

Cleistogamy is a type of automatic self-pollination of certain plants that can propagate by using non-opening, self-pollinating flowers. 

Autogamy or self-fertilization, is the fusion of two gametes that come from one individual. It is predominantly observed in the form of self-pollination, a reproductive mechanism employed by many flowering plants.

Homogamy is a state in which the flowers of a plant are all of one type either hermaphrodite or of the same sex.

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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