An introduction to the characteristics of the major groups of invertebrates and vertebrates.

An introduction to the characteristics of the major groups of invertebrates and vertebrates.

Discusses what invertebrates are and how they are classified, and provides in-depth information about many specific invertebrates, such as insects, sponges, and

Are bugs out to get us? Mosquitoes suck our blood. Wasps sting! Lice move into our hair and raise families there! Scorpions strike with poison. Why do they do t