Animals can be divided into groups ... Reptiles can live in many different places, like deserts, forests, and oceans. Some examples of reptiles are snakes, lizards, crocodiles, and turtles!

Trainers: Come on, baby! Right here, come on! Narrator: From penguins to house spiders, let's look at how 10 different members of the animal kingdom prepare for some of Hollywood's biggest roles.

We move on to consider the evolution of mate choice, and then we describe the types of mating systems found in animals. Sexual reproduction often involves evolutionary differentiation of males and ...