The megaspore mother cell is differentiated from one of the cells of the
Nucellus
Pollen grain
Microsporangia
Both $(b)$ and $(c)$
An ovule which becomes curved so that the nucellus and embryo sac lie at right angles to the funicle is
When the pollen tube enters through the micropyle, it is termed as
In which of the following, parthenocarpy makes no sense?
Adventive polyembryony is common in
Male gametes in angiosperms are formed by the division of