Give differences: Male gametophytic stage and Female gametophytic stage.

Which one of the following operations with flowering plants would be most likely to produce the greatest number of variations in the offspring?

Study the following statements.
$I$. Pollen grains of many species cause severe allergies and bronchial afflictions in some people,often leading to chronic respiratory disorders.
$II$. Pollen grains are rich in nutrients.
$III$. Carrot grass came into India as a contaminant with imported wheat.

Which of the following statements is true regarding $Strobilanthus \; kunthiana$ (Neelakuranji)?

Select the correct option for $Strobilanthus$ $kunthiana$ (Neelakurinji).

How many of the following statements are true about angiosperms?
$A$. The generative cell floats in the cytoplasm of the vegetative cell.
$B$. The stalk of the ovule is called the funiculus.
$C$. Pollen grains are shed at the two-celled stage.
$D$. The embryo sac is diploid.
$E$. The megaspore mother cell towards the chalazal end becomes functional.