DNA replication occurs
a. before mitosis.
b. immediately before prophase of mitosis.
c. during prophase of mitosis.
d. during metaphase of mitosis.
e. at any time during cell division.
ANSWER: a
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Researchers have found that an octopus given a clear plastic box with three different types of lids and a crab inside will eventually figure out how to get at least one of the lids open to get the crab. They have also shown that after a new octopus observes a veteran octopus (who already knows how to open the box), the new octopus is able to open the box and always uses the same type of lid that the veteran used. What term best describes these behaviors?
A. cognitive learning B. innate C. imprinting D. habituation E. associative learning
Organisms that make their own nutrients by capturing energy from nonliving resources (solar energy) are called
A. detritivores. B. parasites. C. decomposers. D. consumers. E. producers.
An organism can exchange matter and energy with its surroundings. Thus, any change in an organism's
energy content must be balanced by a corresponding change in the energy content of the surroundings. As such, an organism is referred to as: a. a closed system. b. an open system. c. a dynamic system. d. a thermally reactive system. e. a potential system
Which of the following is necessary for replication of a prion?
A) DNA B) DNA polymerase C) lysozyme D) PrPSc E) RNA