The term facultative refers to
A. using chemicals for energy production.
B. using light for energy production.
C. the ability to exist in a wide range of conditions.
D. using oxygen for metabolism.
E. existing in a very narrow niche.
Answer: C
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Codons are part of the molecular structure of _____
A) a protein B) mRNA C) tRNA D) rRNA
An amine hormone would possess which of the following traits? Choose all that apply
A. It would contain one aromatic amino acid. B. Its chemical structure would resemble that of cholesterol. C. It would only contain amino acid chains. D. It would be hydrophilic. E. It would be hydrophobic.
Human ventilation is
a. negative pressure inhalation. b. positive pressure inhalation. c. negative pressure exhalation. d. both b and c.
During a study session about evolution, one of your fellow students remarks, "The giraffe stretched its neck while reaching for higher leaves; its offspring inherited longer necks as a result." Which statement is most likely to be helpful in correcting this student's misconception?
A. Disuse of an organ may lead to its eventual disappearance. B. Only favorable adaptations have survival value. C. If the giraffes did not have to compete with each other, longer necks would not have been passed on to the next generation. D. Characteristics acquired during an organism's life are generally not passed on through genes. E. Spontaneous mutations can result in the appearance of new traits.