Question

Write one advantage and one disadvantage of cleistogamy to flowering plants

Answer 1

Advantages:

* This type self-pollination does not require external agent.

* It preserves useful characters of the parent individual.

* It helps in producing pure lines.  

Disadvantages:

*This self-pollination does not help in producing new varieties and species.

Answer 2

Advantage: Cleistogamy is that enables assured seed-set in the absence pollinators.

Disadvantage: Cleistogamy is that continued self pollination may lead inbreeding depression.