NEET BIOLOGY

Detailed explanation-1: -Cleistogamous flowers are the ones that do not open and show self-pollination. The advantage of a cleistogamous flower is that they are not dependent on pollinators, hence producing seeds in all conditions.

Detailed explanation-2: -Hence, an advantage of cleistogamy is no dependence on pollinators.

Detailed explanation-3: -Cleistogamous flowers produce assured seed-set even in the absence of pollinators. This is because the anther and stigma lie close to each other. When pollen is released, it comes in contact with the stigma resulting in pollination. Hence, pollinators are not required for pollination in cleistogamous flowers.

Detailed explanation-4: -Sexual reproduction is non-existent due to the absence of cross-pollination and does not produce any genetically distinct seeds. No distinct seeds mean no increase in the genetic diversity of the plant population. This results in harmful alleles and an increase in breeding depression.

Detailed explanation-5: -Cleistogamy is self-pollination. It is well known in plants like peanuts, beans, and beans. The advantage is no pollinator is required as it can propagate by using non-opening, self-pollinating flowers. The absence of variation is the biggest disadvantage.