Which of the following are devices for self-pollination?

Who worked on embryological aspects and popularized the use of embryological characters in taxonomy?

Identify $X$ and $Y$ from the figure.

Select the correct option for the following statements:
$(i)$ In the embryo sac of angiosperms,the synergids and antipodals degenerate / do not degenerate after fertilization.
$(ii)$ In the leaves of dicotyledonous plants,parallel / reticulate venation is observed.

In which animal do haploid cells divide mitotically to produce gametes?

Select the option that represents the correct statement.