Evidence for Behaviors/Traits Impacting Reproduction Practice Test

Behaviors or physical traits can affect reproductive success. Two groups of male lizards were observed in the same rocky area during the same month. Group T performed more push-up displays (a behavior) per hour than Group L. Researchers also counted the number of times each group was seen paired with a female and the number of nests later found in their territories.

What evidence links the display behavior to reproductive success in this study?

A student compared two groups of male fish in the same aquarium tank over the same month. Behaviors can affect reproductive success. The table shows how often males performed a nest-building behavior and how many eggs were found in their nests.

The student claims: “Nest-building causes more eggs in the nest, so any male fish that builds nests will always have the most eggs.”

Which part of the claim is not supported by the evidence?