Question

which two factors most influenced the populations of paramecia when raised separately?
a. available space
b. food supply
c. interspecies competition
d. availability of water
e. environmental temperature

Explanation:

When paramecia are raised separately, interspecies competition (C) does not apply as there's only one species. Available space (A) and food supply (B) are key abiotic/biotic factors affecting population growth. Water availability (D) and environmental temperature (E) are more about habitat suitability but for separate cultures, space and food (resources) are more direct. So the two factors are A and B.

Answer:

A. available space, B. food supply