Question

A particular environmental change causes the deaths of 25 individuals in a herd of 100 wild horses, and it kills 50 individuals in a herd of 200 horses. In this case, the growth of a wild horse population is most likely limited by __________. (Assume that the two herds are found in territories of equal size.)

a. the presence of another species that uses the same food resource
b. food supply
c. a predator
d. a density-independent factor
e. a density-dependent factor

Answer 1

D

Explanation:

1. As given here, that the particular environmental change causes the death of 25 individuals in the population of 100 horses.

2. And is case of 200 horses, the total death is 50.

3. So the death is according to the population size, not according the density.

Therefore, here the growth of this population is limited by density-independent factor.