Birth rate is technically termed as :

1. Population density
2. Natality
3. Carrying capacity
4. Mortality

Which of the following is an exhaustible source of energy ?

1. Fossil fuels
2. Nuclear energy
3. Solar energy
4. Wind energy

Assertion. Population density is the number of individuals in an area of 100 square kilometers per year.

Reason. Population density gives us an idea of all the living organisms of different species in a particular area every year.

1. Both A and R are True
2. Both A and R are False
3. A is True and R is False.
4. A is False and R is True.

Assertion. Tubectomy is a temporary method of contraception for males in which the sperm ducts are cut and ligated with a nylon thread.

Reason. Tubectomy closes the passage of the sperms. The sperm duct is also known as vas deferens, which stores the sperms for some days during which they mature and become motile.

1. Both A and R are True
2. Both A and R are False
3. A is True and R is False.
4. A is False and R is True.