For a dioecious plant,which of the following is true?

The phenomenon in which anther and stigma grow and mature at the same time is called:

Give scientific reasons: Outbreeding devices increase fertility.

Given below are two statements.
Statement $I$: Self-incompatibility is a device that prevents outbreeding.
Statement $II$: Self-incompatibility is a genetic mechanism due to which germination of pollen on the stigma of the same flower is inhibited.
In the light of the above two statements,choose the correct answer from the options given below.

Define the following terms:
$1.$ Chasmogamous
$2.$ Cleistogamous

Cross-fertilisation is favoured by