Question

discribe different type of out breeding device​

Answer 1

Answer:

The following are the three Outbreeding devices used by plants for the prevention of self-pollination:

Unisexuality: In sexuality, the plant bears, either male or female flowers. ...

Dichogamy: In this mechanism, the stigma and the anther have different maturity times. ...

Protandry: The androecium matures before the gynoecium.

Answer 2

Answer:

Three outbreeding devices are :

Explanation:

i ) Dichogamy : Stamens and carpels do not mature at the same time. Therefore stigma is not receptive at the time of pollen release or vice-versa.

ii Dicliny : The flowers are unisexual.

iii Herkogamy : There is a physical barrier present between anther and stigma e.g. in calotropis or the anther and stigma are placed in different positions.