Archaeal membranes contain which of the following lipids?
A. Glycolipids
B. Sulfolipids
C. Phospholipids
D. All of the choices are correct.
Answer: D
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Cells of the pancreas produce and directly release enzymes to the digestive system. The type of secretory mechanism associated with the pancreatic cells is
A) transport secretion. B) regulated secretion. C) constitutive secretion. D) intracellular secretion. E) consistent secretion
What percent of Earth’s total primary
production is supplied by the ocean’s primary producers?
a. 10 b. 30 c. 50 d. 70 e. 90
An effector can be
a. muscle. b. nerve. c. gland. d. receptor. e. both muscle and gland.
Four of the five answers listed below are probable components of the Earth's primitive atmosphere
Select the exception. a. hydrogen gas b. oxygen gas c. nitrogen gas d. carbon monoxide gas e. carbon dioxide gas