when there is self pollination in flower then the pollen grain of the same flower falls on the stigma and in cross pollination the pollen grain of different flower falls on the different flower . i have a doubt that when cross pollination takes place why doesn't a new kind of fruit is produced ?

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Solution

Self pollination involves pollen from the same flower fertilizing the stigma. In cross pollination the pollen from a different flower land on the stigma of another flower but belonging to the same species. The pollen and the stigma have chemical receptors which allow penetration of pollen grain and its germination only when they belong to the same species. Hence there is no way a new fruit can be formed.

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Give one word/term for the following :
(a) A flower containing both male and female parts
(b) Arrangement of flowers on a twig/stem
(c) When pollen grains of a flower reach the stigma of the same flower.
(d) When maturation time of reproductive parts in a flower is different.
(e) When stigma and anthers do not grow up to same height, which favours only cross-pollination ?
(f) Pollination of flowers by insects.
(g) Pollination of flowers by birds.

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