Prokaryotes may have:
a. one single circular chromosome.
b. many circular chromosomes.
c. one single linear chromosome.
d. A and B.
e. A, B, and C.
E
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Which of these is a key feature of the scientific method?
A. Scientific hypotheses must be testable. B. Experiments need not be repeatable. C. Science is moral. D. Once a hypothesis has been proved, it can never be changed.
List and explain the six steps in the hydrological cycle.
What will be an ideal response?
Daphnia will switch from parthenogenesis to sexual reproduction under all of the following conditions except:
A. warm temperatures. B. decreased food supply. C. cool temperatures. D. accumulation of wastes. E. None of the answer options would cause Daphnia to switch.
Recognition sites of restriction enzymes are ________.
Fill in the blank(s) with the appropriate word(s).