Identify the labeled structures.

A:

B:

C:

D:

E:

Which of the following describes a difference when gram-positive bacteria are compared to gram-negative bacteria?

What function does the limb sever in each animal? how are the limb bones of the four animals similar? based on these similarities what can be inferred about the evolution of the four animals.

The two tubes contain bromothymol blue. after 24 hours, what will the color of the water be in tube b? a. green (it won't change) b. yellow c. blue d. colorless (clear)