The accompanying graph shows data collected to test the hypothesis that the dewlap extension and the push-up displays of Anolis lizards play a role in sexual selection. Given this data, what can you conclude?
A) The dewlap extension does not play a role in sexual selection, but push-up frequencies do.
B) Both the dewlap extension and the push-up frequencies play a role in sexual selection.
C) Neither the dewlap extension nor the push-up frequencies play a role in sexual selection.
D) The dewlap extension plays a role in sexual selection, but the push-up frequencies do not.

Question

The accompanying graph shows data collected to test the hypothesis that the dewlap extension and the push-up displays of Anolis lizards play a role in sexual selection. Given this data, what can you conclude? 
A) The dewlap extension does not play a role in sexual selection, but push-up frequencies do. 
B) Both the dewlap extension and the push-up frequencies play a role in sexual selection. 
C) Neither the dewlap extension nor the push-up frequencies play a role in sexual selection. 
D) The dewlap extension plays a role in sexual selection, but the push-up frequencies do not.

Quizplus · Accepted Answer

The graph shows that female lizards consistently choose males with both high dewlap extensions and high push-up frequencies, indicating that both traits play a role in sexual selection. The data for these two traits are positively correlated, further supporting this conclusion. So, both the dewlap extension and the push-up frequencies play a role in sexual selection.

The Accompanying Graph Shows Data Collected to Test the Hypothesis