In the late fall, bats hibernate in clusters with many bats pressed together and holding on to one another. Which of the following statements does not represent an advantage of this behavior?

On a cold day, blood vessels in the skin __________.

By definition, an ectotherm __________.

The term endotherm refers specifically to __________.

The wolf, his coat glowing in the early spring sunshine, sat atop a cold boulder after unsuccessfully pursuing a plump jackrabbit. He continued to pant while __________.

It is a cold day in the lecture hall. When you rest your arm on the cool laminated desktop at your seat, heat is transferred __________.

Which of the following statements is true?