A scientist sets up terrariums in a laboratory and observes the growth of lizards in each terrarium. Which of the following observations could be used as evidence that the amount of space in an environment can affect an animal's growth?

Question

a. two different species of lizard grow to different sizes in the same terrarium.
b. two lizards of the same species grow to different sizes in the same terrarium
c. two lizards of the same species grow to different sizes in different-sized terrariums
d. two lizards of the same species grow to different sizes in terrariums with different food supplies

Answer 1

The observation that could be used as evidence that the amount of space in an environment can affect an animal's growth is:

c. two lizards of the same species grow to different sizes in different-sized terrariums.

This observation directly relates the differences in space (size of the terrarium) to the growth of the lizards, allowing for a clearer understanding of how space can impact their growth. The other options involve factors that may confound the results, such as species differences, consistent environment, or food supply variations.