Which is not usually true of archaea?
A. They are found as rods, spheres, or spirals.
B. They reproduce by binary fission.
C. They contain rigid cell walls.
D. They are found as single cells.
E. They contain peptidoglycan as part of their cell walls.
E
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In this figure, which of the following are composed primarily of proteins?
a. A and B b. B and C c. B and D d. A and D
Distinguish between endocrine and exocrine glands and give examples of each
What will be an ideal response?
Scientists at NIH are making progress in using stem-cells to cure
a. Parkinson’s disease. b. type 2 diabetes. c. sickle-cell anemia. d. bipolar disorder. e. anorexia.
Which of the following are functions of skeletal muscle?
A. Maintain posture. B. All are functions of skeletal muscle. C. Stabilize joints. D. Generate heat.