Which feature does not occur in all living organisms?
a. All occur in living organisms
b. Make and use organic molecules
c. Consist of one or more cells
d. Use DNA as their hereditary material
e. Run the process of metabolism
a
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The ability to determine where a sound is coming from depends primarily on
A. differences in sound intensity in the two ears. B. differences in time of sound arrival to the two ears. C. differences in sound frequency received at the two ears. D. differences in both frequency and intensity at the two ears. E. None of these choices are correct.
Which of the following would NOT be part of the germ tube?
A. tube cell nucleus B. two sperm cells C. pollen sporopollenin wall D. pectin precursors E. cell membrane
Based on the evolutionary tree, which letter represents the common ancestor of all
eukaryotes?
a. A b. B c. C d. D
Which of the following reactions is the least likely to occur spontaneously?
A. A + B -> C if ?G° for the reaction equals -2.5 kcal/mol. B. A + B -> C if ?G° for the reaction equals -12.5 kcal/mol. C. A + B -> C if Keq for the reaction equals 0.5. D. A + B -> C if Keq for the reaction equals 1.5. E. A + B -> C if ?G° for the reaction equals +1 kcal/mol.