Lizards - 2nd/3rd

Next Generation Science Standards:

5-LS2-2 (Ecosystems: Interactions, Energy, and Dynamics)
"Construct an argument supported by empirical evidence that changes to physical or biological components of an ecosystem affect populations."

3-LS4-3 (Biological Evolution: Unity and Diversity)
"Construct an argument with evidence that in a particular habitat some organisms can survive well, some survive less well, and some cannot survive at all."