Organisms and Populations — BIOLOGY STD 12 Science — Question

While planning for an artificial hybridization programme involving dioecious plants, which of the following steps would not be relevant?

From given below in which seed endosperm may persist in the mature seed ?

If mating is random, population is large and mutation does not occur; then gene frequencies of population from generation to generation remain constant. This was put forwarded by

Which one of the following is the age of amphibians, fishes and invertebrates

Triple fusion is characteristic of

Mating between two individuals differing in genotye to produce genetic variation is called

The Leydig cells as found in the human body are the secretory source of:

In man, which of the following genotypes and phenotypes may be the correct result of aneuploidy in sex chromosomes

Continuous use of alcohol causes

Temporary cessation of menstruation indicates: