What is the primary growth-promoting hormone of plants?
A. auxin
B. gibberellin
C. abscisic acid
D. cytokinin
Answer: A
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The inorganic non-protein components that participate in enzyme catalysis are known as
A. coenzymes. B. cofactors. C. products. D. substrates. E. reactants.
What information is provided by the fossil record that cannot be provided by examining living organisms?
A. All of the answer options are correct. B. a record of extinct species C. absolute dates for when different taxa diverged D. records of environmental conditions E. timing of mass extinctions
Which of the following was first produced commercially using recombinant DNA technology?
A. Interleukins B. Human growth hormone C. Hepatitis B vaccine D. Human insulin
Which biome is characterized by weasels, gray wolves, ptarmigan, musk oxen, and lemmings?
a. tundra b. desert c. tropical rain forest d. savanna e. temperate deciduous forest