The current model of cancer development is that
A) cancer develops from a single cell that evolves through one to two mutations.
B) cancer develops from a single cell that evolves through multiple mutations.
C) cancer develops from multiple cells that evolve through multiple mutations.
D) cancer develops from multiple cells that evolve through one to two mutations.
B) cancer develops from a single cell that evolves through multiple mutations.
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A millicurie, a unit of radioactivity, is
(a) a tenth of a curie. (b) a hundredth of a curie. (c) a thousandth of a curie. (d) a millionth of a curie.
Enzymes function primarily by
a. forcing the reactants into an altered environment which in turn creates a change in the free energy of the reactants relative to the products. b. altering the equilibrium point of a particular reaction to favor the formation of products. c. increasing the probability that the reactants will come into close proximity to each other in the proper orientation for forming the transition state molecule. d. removing reactants from solution in a set ratio that enhances the chances of the remaining individual reactants interacting with each other. e. changing the ratio of reactants to products so that the forward reaction is favored.
Which of these is a renewable resource?
a. biofuels b. fossil fuels c. oil d. coal e. all of the above
Transgenic animals are ________ modified organisms.
Fill in the blank(s) with the appropriate word(s).