The type of skeleton that is usually composed of either a calcium-containing shell or chitin is a(n)

A. endoskeleton.

B. exoskeleton.

C. hydrostatic skeleton.

D. gastrovascular cavity.

E. vascular canal.


B. exoskeleton.

Biology & Microbiology

You might also like to view...

The process by which cells acquire specialized forms and functions is called

A. cell growth. B. cell elasticity. C. cell differentiation. D. cell replication. E. None of the choices are correct.

Biology & Microbiology

Which of the following is not a lipid?

a. Fatty acid b. Glucose c. Oil d. Steroid e. Wax

Biology & Microbiology

Which of the following is a physiological mechanism used by endotherms to dissipate heat?

a. basking b. contact with hot surfaces, such as rocks c. vasodilation d. group activities that generate heat

Biology & Microbiology

Smoking may increase your risk of lung cancer, but it does not affect the risk of bladder cancer.

a. true b. false

Biology & Microbiology