Which of the following factors are responsible for the size of population of any species?
A. Predation pressure
B. Food availability
C. Adverse weather
D. Apomixis
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → A, B and C only
The size of a population is not fixed. It changes with time.
A. Predation pressure — Correct. Predators kill and eat their prey, so the prey population goes down.
B. Food availability — Correct. More food allows a population to grow. Less food stops its growth.
C. Adverse weather — Correct. Very hot, cold or dry weather increases deaths and reduces the population.
D. Apomixis — Incorrect. Apomixis is the formation of seeds without fertilisation in some plants. It is a way of reproducing. It is not a factor that raises or lowers the size of a population.
NCERT Extract:
Population Growth –
