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Q.6 Explain the difference between self-pollination and cross-pollination.


Answer :

Self-pollination :

(1) If the pollen lands on the stigma of the same flower or another flower of the same plant, it is. called self-pollination.

(2) Self-pollination occurs only in bi-sexual flowers.

(3) It involves the transfer of pollen from the stamen to the pistil of the same flower.

(4) Pollinating agents are not required.

(5) Wheat, rice, pea, orchids, barley, tomatoes, peaches, apricot are examples of self-pollination.

Cross-pollination :

(1) When the pollen of a flower lands on the stigma of a flower of a different plant of the same kind, it is called cross-pollination.

(2) It occurs in both unisexual and bisexual flowers.

(3) It involves the transfer of pollen from the stamen of one flower to the pistil of another flower.

(4) A pollinating agent such as wind, water, insects, etc. is not required.

(5) Mulberry, maize, pumpkins, strawberries, blackberries are examples of cross-pollination.

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