Which of the following is not in the same clade as the others?

a. Birds
b. Dinosaurs
c. Lizards
d. Crocodiles
e. Alligators


Answer: c. Lizards

Biology & Microbiology

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Which of the following statements does NOT describe a function of the cell walls of bacteria?

A. They maintain cell shape. B. They prevent cross-fertilization. C. They avoid disintegration in water with low concentrations of salt. D. They protect against other bacteria. E. They protect against viruses.

Biology & Microbiology

When neurons are not producing electrical signals, there is still a voltage difference across their membranes. What is this voltage called?  

A.  channel-gate bias B.  electrolyte voltage C.  equilibrium potential D.  resting potential E.  ion current

Biology & Microbiology

Dwarfism may be due to insufficient production of

a. mineralocorticoid. b. glucocorticoid. c. calcitonin. d. GH e. the parathyroid hormone.

Biology & Microbiology

Undifferentiated cells that can divide and specialize to form a variety of different cells are called:a

differential cells. b. mother cells. c. somatic cells. d. stem cells. e. morphogens

Biology & Microbiology