In the adolescent male or female premature closure of the growth centres of the long bone may result in

The cross between male lion and female tiger results in the product of .

"Growth of long bones are bidirectinal" -Explain.

The cross between male lion and female tiger results in the production of

The fusion of a male and a female gamete gamete results in the formation of

When a diploid female plant is crossed with a tetraploid male, the ploidy of endosperm cells in resulting seed is :

The changes that occurs in female at the onset of puberty are: (a) The enlargement of breasts (b) Beginning of menstrual cycle (c) Stoppage of growth of long bone and height (d) All the above

Assertion : Only the pre-pollination growth of male gametophyte occurs inside the microsporangium whereas the remaining growth occurs over the female reproductive organs. Reason : Whole of the growth of female gametophyte occurs inside the megasporangium.