Question

population biology
a population is a group of organisms, all of the same species, that live in a specific area.
ex: populations of birch trees, populations of cardinals, etc.
what is population density?
the number of individuals per ____ or volume
population growth
populations ____ grow indefinitely.
populations will change over time
some will become ____
some will ____ and have increases followed by decreases.

Explanation:

Population density is defined as the number of individuals per area or volume. Populations cannot grow indefinitely due to limiting factors. Some populations may become extinct, while others may fluctuate.

Answer:

What is population density? - The number of individuals per area or volume
Population Growth - Populations cannot grow indefinitely. Some will become extinct and have increases followed by decreases. Some will fluctuate.