All animals need to make copies of themselves ... Although some very simple kinds of creatures, like bacteria, do simply make copies of themselves. They just divide in two, and that's that.

Animals also choose their mates ... but relatively few males mate successfully (Figure 2). Those males that do mate tend to mate with many females-thus a few males have very high reproductive ...

But what about all the little animals? After all ... with his tail claspers—which male damselflies often do to coerce females to mate with them. If you’ve ever spent time near a pond, lake ...