The region of land—approximately 4 km2—a jaguar must roam to collect food would be an example of a(n)
question 14 options:

biome.

ecosystem.

habitat.

population.

The correct option is C. habitat

Explanation:

In ecology, a habitat can be described as a place where an organism lives. A species habitat can be defined as a place where it can find shelter, where it can find its food, where it can mate etc. Hence, option C is correct.

Other options like option D are false because a population is not a region of land. Population can be described as the number of individuals of a species which live together in an area at the same time period and can interbreed to produce fertile offsprings.

"do a testcross with a homozygous recessive plant."