ICSE

The different times of maturation of androecium and gynoecium.

The flower may be either male or female and they may be borne on separate plants.

The disadvantage of cross-pollination are:- Some pollination agent is always needed which may or may not be available at the proper time. A lot of wastage of pollen.

The advantage of cross-pollination are:- The offsprings are healthier. The seeds produced are abundant and viable. New varieties may be produced by cross-pollination of two different varieties of the same species.

The transfer of pollen from anthers to the stigma of one plant to another plant of the same species.

The disadvantages of self-pollination are as follows : Continued self-pollination, generation after generation, may lead to the weakening of the variety of the species. The seeds produced through it are poor in quality and give rise to less vigorous offspring. The weaker or defective characters of the variety or breed cannot be eliminated It does …

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The advantages of Self-pollination are as follows: It is much surer in such bisexual flowers where stamens and carpels mature at the same time. Parental characters are preserved indefinitely. There is no wastage of pollen grains. Even a small quantity of pollen will suffice. The flowers need not be large and showy. Scent and nectar …

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Self-pollination is the transfer of pollen from the anther to the stigma of the same flower or to the stigma of another flower of the same plant.

There are two kinds of pollination: Self-pollination Cross-pollination

The pollen of a flower of another plant of the same species may fall on the stigma is called allogamy.