Clostridium perfringens causes which of the following?
A. Gas gangrene
B. Fire blight disease of pears
C. Tuberculosis
D. Pneumonia
Answer: A
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Nuclear pores permit the passage of all the following except:
A. RNA only outward. B. proteins inward and outward. C. DNA molecules only outward.
Plants that are called C4 plants are better able to utilize ________ than C3 plants.
A. oxygen B. minerals C. water D. carbon dioxide E. chlorophyll
The phase of the cell cycle in which it is carrying out its normal functions and getting read to divide is called
A) Anaphase B) Prophase C) Interphase D) Mitosis E) G2
If two populations of a species show significant structural differences, it is likely that
A. there is little sexual reproduction between populations. B. they are reproductively isolated. C. each is specifically adapted to a certain environmental situation. D. All of the choices are correct.