A pollen tube grows down the style because
It helps in fertilization
It takes nutrients from the style
Filiform apparatus of synergids attracts the pollen tube
Of chemical attraction
How many meiotic division would be required to produce $101$ female gametophytes in an angiosperm
The functional megaspore undergoes
An orthotropous ovule is one in which micropyle and chalaza are
The role of triple fusion in angiosperms is to produce