If x indicates the location of fossils of two closely related species, then fossils of their most-recent common ancestor are most likely to occur in which stratum?
A) A
B) B
C) C
D) D
Answer: C
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During ____ photosynthesis, H2S, H2, Fe2+ or AsO3 3 - can be oxidized
Fill in the blank with the appropriate word.
Cells may enter stationary phase because of
A. the depletion of an essential nutrient. B. the accumulation of toxic waste products. C. a lack of available oxygen. D. All of the choices are correct.
In simple diffusion,
a. the rate of movement of molecules is influenced by temperature and pressure. b. the movement of individual molecules is random. c. the movement of molecules of one substance is independent of the movement of any other substance. d. the net movement is away from the region of highest concentration. e. all of these happen.
Which of the following statements accurately describes the following reaction?
a. enzymatic digestion of carbohydrates in the mouth by enzymes secreted by the salivary
glands
b. enzymatic digestion of proteins in the stomach by enzymes secreted by the pancreas
c. enzymatic digestion of lipids in the stomach by enzymes secreted by the liver
d. enzymatic digestion of proteins in the small intestine by enzymes secreted by the pancreas
e. enzymatic digestion of lipids in the small intestine by enzymes secreted by the pancreas