In an unchanging environment, a well-adapted population is likely to experience no natural selection
of any kind.
Indicate whether the statement is true or false.
ANS: F, stabilizing selection
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One important advantage of eukaryotic cells as hosts for cloning vectors is that they already possess the complex RNA and posttranslational processing systems required for the production of eukaryotic proteins
Indicate whether the statement is true or false.
Which of the following protein-functional categories is mismatched?
A. hexokinase-metabolic enzyme B. tubulin-structural protein C. insulin-motor protein D. hemoglobin-transport protein E. antibodies-protective protein
The four nitrogen bases found in RNA are
A. adenine, thymine, guanine, and uracil. B. adenine, cytosine, guanine, and uracil. C. adenine, thymine, cytosine, and uracil. D. thymine, cytosine, guanine, and uracil. E. None of the answer choices is correct.
The Soviet chemist Oparin suggested that for organic molecules to form on Earth, the atmosphere was probably rich in
A. argon. B. oxygen and water. C. hydrogen. D. oxygen. E. helium.