Major gene reshuffling takes place during ____
a. prophase I
b. metaphase I
c. anaphase I
d. metaphase II
e. anaphase II
ANSWER: a
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Which of the following is/are necessary for the replication of a satellite virus?
A. Host cell only B. Prion only C. Helper virus only D. Host cell and helper virus
Which of the following reactions would require the hydrolysis of at least two ATP molecules (?G = -14.6 kCal) for it to occur?
A. A reaction that has a ?G = -8 kCal. B. A reaction that has a ?G = +8 kCal. C. A reaction that has a ?G = -16 kCal. D. A reaction that has a ?G = +16 kCal. E. A reaction that has a ?G = -14.6 kCal.
From which germ layer(s) do(es) the stomach arise?
a. ectoderm only b. endoderm only c. mesoderm only d. mesoderm and endoderm e. endoderm and ectoderm
A theory and a hypothesis are different in that
A. you must have a theory before you can form a hypothesis. B. a theory is developed as a result of broad agreement among scientists and a hypothesis is a much less substantiated idea. C. a theory is much easier to disprove than a hypothesis. D. a theory can never be disproved while a hypothesis can.