Question

How bisexual and unisexual conditions are denote?

Answer 1

On the basis of the presence of sexual organ plants are two types. Unisexual and bisexual plants. Unisexual plants are also known as monoecious and bisexual plants are also known as dioecious.

Complete answer:
Pollination is a process through which plants transfer pollen to the stigma. Pollination is of two types i.e., self pollination and cross-pollination. Self-pollination is the transfer of the pollen grains from the anther of a flower to the stigma of the same flower or different flower of the same plant. Cross-pollination is the transfer of the pollen grain from another of one flower to the stigma of another plant.
In bisexual plants both organs present in the same plant that means pollen and ova are on the same plant so therefore bisexual plant pollen have more chance to get pollinate in right place than in unisexual plants. Bisexual plants have a big advantage to get self pollinate. In bisexual fertilizing plants for example peas, transfer of pollen grains to the stigma is relatively easy as anthers and stigma are located close to each other.

Note: Adaptation seen in plants to ensure self-pollination Bisexuality Homogamy; maturation of both androecium and gynoecium at the same time. Cleistogamy: A condition in which the flower does not open. In such flowers, the anther and the stigma lie close to each other. When another dehisce in the flower buds, pollen grains come in contact with stigma to affect pollination. Cleistogamy ensures seed formation in the absence of any pollinating agent.