The ovule in which the funicle, chalaza and micropyle lie in one vertical plane, is called
Campylotropous
Amphitropous
Orthotropous
Anatropous
An angiospermic plant is having $24$ chromosomes in its leaf cells. The number of chromosomes present in synergid, pollen grain, nucellus & endosperm will be respectively
Female gametophyte of a typical dicot at the time of fertilization is
$A$ : Filiform apparatus guides the pollen tube into the synergids.
$R$ : It is special cellular thickening at micropylar tip to secrete chemotropic stimulus.
Single cell which is present in the micropylar region of the nucleus and it develops
The functional megaspore undergoes