For which of the following populations would biologists most likely use number per unit of volume, rather than number per unit of area, in measuring population density?
A) Pine trees in a forest
B) Mice in a patch of grassland
C) Guppies in a lake
D) Squirrels on a campus
E) Oak seedlings in a backyard

Question

Quizplus · Accepted Answer

When measuring population density for organisms that inhabit a three-dimensional space, such as fish in a lake, biologists would use number per unit of volume rather than number per unit of area, as density will vary throughout the water column. Therefore, the most suitable option here would be guppies in a lake.

For Which of the Following Populations Would Biologists Most Likely