What was unique about the study conducted by Campbell-Staton?

- The study was unique because the unexpected nature of extreme weather events makes the responses to such events is hard to be studied.

- But Campbell-station stressed on the effects of the natural selection of green anole lizards after the cold weather event that happened during the winter in the southeastern united state.

- He was able to collect data after and before the extreme weather and was able to measure selection at three levels:

1 - gene expression.

2 - genetic variation.

3 - whole animal function.