Which is essential for flowering

Asertion :- Cleistogamy is disadvantageous for plants. Reason:- Cleistogamous flowers do not opens so sex organs do not receive sufficient light,which is essential for maturation of gametes.

Asertion :- Cleistogamyis disadvantageous for plants. Reason:- Cleistogamous flowers do not opens so sex organs donot receive sufficient light,which is essential for maturation of gametes.

Which is essential for the growth of tip?

Which one is not essential for plants?

Which one is not essential for plants?

Essential whorls in a flower

Which of these is not essential for allogamy