What are two parts of sexual reproduction that produce genetic variation?

In the united states there are many types of rabbits. four different species have four different ranges or habitats. in which range would developing white fur in winter most likely not be an advantage?

What elements together make up seven percent of the earth crust

Some animals shiver as a natural, involuntary response to their environment. shivering generates heat. this is an example of which function? reducing movement to regulate body temperature reducing movement to regulate blood glucose maintaining homeostasis by regulating body temperature maintaining homeostasis by regulating blood glucose