Pollen tube enters through
Central cell
Synergid cells
Antipodal cells
Egg cell
Double fertilization was first discovered by Nawaschin $(1898)$ in
Filiform apparatus is characteristic feature of
Select the correct diagram.
In which of the following types of embryo sac the megaspore nuclei do not fuse to form a triploid nucleus at chalazal end
Exalbuminous seeds are of