In Moore and Marler's study of spiny lizards, testosterone-injected males
A) developed larger brains than control males.
B) survived less well than control males.
C) suffered opportunity costs.
D) Both a and b
E) Both b and c

Question

Quizplus · Accepted Answer

The study found that testosterone-injected males had reduced survival rates compared to control males, which indicates that they suffered opportunity costs. There was no evidence that testosterone injection led to larger brains.

In Moore and Marler's Study of Spiny Lizards, Testosterone-Injected Males