Which of the following is the most complex level of organization?

A. columnar epithelium
B. cardiovascular system
C. heart
D. brain
E. lungs


Answer: B

Biology & Microbiology

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Indicate whether this statement is true or false.

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With anorexia nervosa a person is not eating

enough to keep their weight within ___ percent of normal.

a. 2 b. 5 c. 10 d. 15 e. 25

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Do all cells of the body express the same genes?

A) Yes, since they all contain the same DNA B) Yes, since they all make the same proteins C) No, since they don't contain the same DNA D) No, since they don't all need to make the same proteins

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What is a major difference between the endoskeleton and the exoskeleton?

a. The endoskeleton is capable of growth. b. The endoskeleton permits movement. c. The endoskeleton contains calcium. d. The endoskeleton is molted more frequently. e. The endoskeleton provides support.

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