Resources and Population Size Practice Test

A wildlife biologist studied the same rabbit population in two fenced fields for 5 months. Both fields started with 30 rabbits. The fields were the same size and had the same weather. The only difference was the amount of grass available (a resource).

Data:

• Field 1 (less grass) → 28 rabbits after 5 months
• Field 2 (more grass) → 55 rabbits after 5 months

Which claim about population size is incorrect based on the evidence? (Resources can limit population size.)

A student observed the same type of caterpillar in two terrariums for 3 weeks. Both terrariums started with 25 caterpillars. The only planned difference was the amount of fresh leaves added each day.

Data after 3 weeks:

• 5 leaves/day → 19 caterpillars
• 15 leaves/day → 31 caterpillars

Which statement is supported by the evidence about resources, population size, and cause? (Resources can limit population size.)