________ arise out of deep water and have a lagoon in the center of it
a. Barrier reefs
b. Atolls
c. Patch reefs
d. Fringing reefs
b
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Which structure prevents blood flowing back into the heart from the aorta between heartbeats?
A. semilunar valve B. atrioventricular valve C. tricuspid valve D. mitral valve E. ductus arteriosus
Refer to the accompanying figure. The structures responsible for detecting linear movement relative to the pull of
gravity are labeled as ____. a. 1 and 3 b. 4 and 6 c. 3 and 5 d. 1 and 6 e. 4 and 7
Which of the following statements is (are) correct about an oxidation-reduction (or redox) reaction?
A) The molecule that is reduced gains electrons. B) The molecule that is oxidized loses electrons. C) The molecule that is reduced loses electrons. D) The molecule that is oxidized gains electrons. E) Both A and B are correct.
Essential fatty acids, which are required in the human diet, are
A) those fatty acids that humans are unable to synthesize. B) the fatty acids that humans can synthesize from simpler molecules. C) the fatty acids used in the construction of the phospholipids of cell membranes. D) stored in the gallbladder.