1. Two species of foxes are shown here. One is a kit fox in Arizona. The other is an Arctic fox. Which is which? How can you tell? Describe at least two traits that make each animal well adapted to...

1. Two species of foxes are shown here. One is a kit fox in Arizona. The other is an Arctic fox. Which is which? How can you tell? Describe at least two traits that make each animal well adapted to its environment.

2. Individuals of two different fish species sometimes mate, but their offspring die soon after hatching. Is this an example of a prezygotic or postzygotic reproductive barrier?