Question

Explain why both unisexual and bisexual flowers can self pollinate.​

Answer 1

Also because self pollination involves pollen to the same flower

Answer 2

Bisexual flowers:

In order to make a new seed male gamete present in a pollen grain units with the female gamete present in the ovule.

Unisexual flowers:

Unisexual flower can self pollinate where both male and female flowers are present on the same plant. Stigma of the female flower can be pollinated by the pollen of the male flower present on the same plant.