Maturation of male and female sex organs at different times in a flower is called

Which of the following is $NOT$ an outbreeding device?

Which of the following prevents self-pollination?

Select the correct option for self-pollination in plants from the following.

Which of the following mechanisms prevents self-pollination?

Match the following columns regarding plant breeding systems and select the correct option:
Column-$I$: $(i)$ Monoecious, (ii) Dioecious
Column-$II$: $(p)$ Prevents both autogamy and geitonogamy, $(q)$ Prevents autogamy but not geitonogamy
Column-$III$: $(x)$ Papaya and Date palm, $(y)$ Castor and Maize