Biology
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.
- Both A and R are True
- Both A and R are False
- A is True and R is False.
- A is False and R is True.
Related Questions
Assertion. The theory of natural selection, proposed by Charles Darwin, is a fundamental mechanism driving human evolution.
Reason. Natural selection operates through the preservation of favourable variations that enhance an organism's ability to survive and reproduce, leading to the gradual adaptation of populations to their environments over time.
- Both A and R are True
- Both A and R are False
- A is True and R is False.
- A is False and R is True.
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.
- Both A and R are True
- Both A and R are False
- A is True and R is False.
- A is False and R is True.
Assertion. Fossil fuels are renewable and non-conventional sources of energy.
Reason. The underground reserves of coal and petroleum are depleting fast. People should look at other non-conventional sources of energy like solar energy, tidal energy, etc. for their use.
- Both A and R are True
- Both A and R are False
- A is True and R is False.
- A is False and R is True.
Assertion. Pesticides are the chemical substances used in agriculture to destroy pests.
Reason. DDT is an example of a pesticide which is widely used all over India. Pests are the enemies of crop.
- Both A and R are True
- Both A and R are False
- A is True and R is False.
- A is False and R is True.