Question

Give an account of any two contrivances or outbreeding device for polination​

Answer 1

Answer:

Unisexuality: In this, the plant bears either male or female flowers. It is also called dioecism. ...

Dichogamy: In this, anthers and stigmas mature at different times in a bisexual flower due to which self-pollination is prevented

Explanation:

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Answer 2

Answer:

#Unisexuality: In this, the plant bears either male or female flowers. It is also called dioecism.

#Dichogamy: In this, anthers and stigmas mature at different times in a bisexual flower due to which self-pollination is prevented.