What Is Life? 2nd Edition by Jay Phelan

تمرين 8

Vampire bats:
A) sometimes regurgitate blood into the mouth of another bat that is close to starving, but the likelihood is a function of whether the individuals are genetically related.
B) are unusual in that they are one of the few animal species that exhibit kin selection.
C) sometimes regurgitate blood into the mouth of an unrelated bat that is close to starving.
D) exhibit reciprocal altruism but not kin selection.
E) There are no such things as vampire bats; they're found only in a Dracula novel.