megasporangium

megasporophyll

megaspore mother cell

megaspore.

egg has a filiform apparatus

there are numerous antipodal cells

reduction division occurs in the megaspore mother cells

a small central cell is present in that embryo sac.

Placenta

thalamus or prtal

anther

connective.

Pollen germination and pollen tube growth are regulated by chemical componrnts of pollen interacting with those of the pistil.

Some reptiles have also been reported as pollinators in some plant species.

Pollen grains of many species can germinate on the stigma of a flower, but only one pollen tube of the same species grows into the style.

Insects that consume pollen or nectar without bringing about pollination are called pollen/ nectar robbers.