Studies where mRNA for tonoplast intrinsic protein from a plant were injected into frog eggs resulted
in ____ the egg cells when they were placed in a hypotonic medium.
a. rapid water loss by
b. no effect on
c. slight swelling of
d. slow water loss by
e. swelling and bursting of
E
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The equation CaSiO3 + CO2 CaCO3 + SiO2 takes into account which of the following processes associated with the long-term carbon cycle?
A. volcanism B. chemical weathering C. subduction D. plate tectonics E. bacteria-based oxidation
In mammalian defenses against invading pathogens, all of these are considered nonspecific defense mechanisms EXCEPT
A. acquired immunity. B. the skin. C. mucous membranes. D. the inflammatory response. E. antimicrobial proteins (e.g., interferon).
In vertebrates, which of the following is not a function of calcium?
A. blood clotting B. muscle contraction C. transport of oxygen to the body's cells D. cell membrane permeability E. strengthening of bone
Multidrug-resistant bacteria
A) are not serious threats to human health. B) have always been common in the natural environment. C) have been eradicated worldwide. D) are becoming less widespread. E) are becoming more widespread.