Biodiversity and Conservation — BIOLOGY STD 12 Science — Question

In which of the following era man was originated?

One of the parents of a cross has mutation in its mitochondria. In that cross, that parent is taken as a male. During segregation of F2 progenies that mutation is found in.

When in a population birth rate and death rate exactly balance each other, it is called as:

In delaying pregnancy or spacing among children, the ideal contraceptive is

Population growth curve in most animals, except humans is

Surgically when oviduct is removed or ligated, it is called:

Nowadays, rhino is present in:

Which one is a non-symbiotic nitrogen fixer?

It is rich in methanogens.