Question

List any three devices in plantsto discourage self pollination andtoencouragecross pollination explain the importanceofeach

Answer 1

Answer:

see on google

Explanation:

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Answer 2

Answer:

First of all what are outbreeding devices n why r they necessary-

Devices that discourage SELF-POLLINATION & encourage CROSS-POLLINATION are known as outbreeding devices.

They r necessary bcuz continued SELF-POLLINATION in flowers causes a downfall in the quality and variety of the products.

There are 4 types of outbreeding devices-

1.) Release of Pollen much before or much after the stigma is ready to accept it (receptiveness of stigma) .

2.) Placement of anther & stigma at such positions so that the pollens do not reach the stigma of the same plant or the same flower.

3.) It is a chemical method in which the stigma inhibits the growth of the pollen tubes into the pistil. This process is known as SELF-INCOMPATIBILITY

4.) Production of flowers or plants that are UNISEXUAL i.e. the plant or flower exhibit dioecy.

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