In castor and maize plants, . . . . . .

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

After anther culture,some diploid plants are observed along with haploid plants. Which of the following parts induces the origin of the diploid plants?

Select the correct option from the following statements regarding pollen grains:
$I -$ Pollen grains are rich in nutrients.
$II -$ In recent years,pollen tablets have been used as food supplements.
$III -$ In western countries,a large number of pollen products are available in the market in the form of tablets and syrups.
$IV -$ Pollen consumption has been claimed to increase the performance of athletes and racehorses.
$V -$ Pollen grains can germinate on the stigma after losing their viability.

Describe the post-fertilization changes in a flower.

Product of sexual reproduction generally generates: