When compared to the leg muscles of an Olympic sprinter, the muscles of an Olympic marathoner would likely show a greater proportion of slow-twitch fibers
A. true
B. false
A
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The two strands of a DNA molecule contain nitrogen bases which are
A. identical. B. parallel. C. complementary. D. proportionate. E. random.
Which of the following apply to the demography of human populations today? (Check all that apply.)
_____ Our ecological footprint is decreasing. _____ We are using distributed resources disproportionately—less than 20% of us use over 80% of the energy. _____ We have plenty of resources still untouched. _____ We use almost half of the Earth's land. _____ We use over half of all renewable fresh water sources.
A(n) ________ increases the rate of a reaction without being permanently altered by the reaction.
A. catalyst B. catalyzer C. enzyme D. rate increaser
In an experiment, the control group is
a. not subjected to experimental error. b. exposed to experimental treatments. c. maintained under strict laboratory conditions. d. treated exactly the same as the experimental group, except for one variable. e. statistically the most important part of the experiment.