The underside/lower section of a turtle’s shell is called the 

Which organ system is unique to Echinoderms?

Which is NOT a type of glands found in the skin of mammals?

Mammals have a relatively large _______________ of the brain compared to other animals.

Reptiles have _____________ fertilization.

Which factor favored the adaptation of vertebrates to the terrestrial environment?

If you saw a bird with a forked tail, slender tipped wings, and no wing slots, it is probably adapted for what?

Which group of animals has tissue-level organization?

This question is for extra credit. There is no penalty or loss of points for skipping this question or for a wrong answer. This question is worth 2 bonus points. Points are based on detail. What is the difference between poisonous and venomous?

Humans are what type of mammal?