Apentix/AP Biology/Unit 8: Ecology/Question
AP Biologymediummcq1 pt

A population contains 2,000 individuals. During one year there are 500 births and 300 deaths, with no immigration or emigration. Which pair correctly gives the net population change and the per-capita growth rate for that year?

A.+800 individuals; 0.40 per year
B.+200 individuals; 0.20 per year
C.+200 individuals; 0.10 per year
D.−200 individuals; −0.10 per year

Explanation

Core Concept

Ignoring migration, net population change is births minus deaths: 500−300=+200 individuals. Relative to the starting population of 2,000, the per-capita growth rate is 200/2000=0.10 per year.

Correct Answer

C+200 individuals; 0.10 per year

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