What evolutionary role is served by the redundancy of the genetic code? What will be an ideal response?
Concepts to Consider: The redundancy of the genetic code may serve to decrease the
likelihood of mutations that could alter the resultant proteins. This helps eliminate harmful
mutations, but also contributes to genetic diversity and therefore to evolution.
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The rate of background extinctions is calculated to be species per year per million species.
A. 0.1 to 1.0 B. 1.0 to 10 C. 0.001 to 0.01 D. 10 to 100 E. None of the answer choices is correct.
In order to establish a membrane potential, the
cytoplasmic fluid is ____ compared to the interstitial fluid
a. more positively charged b. more negatively charged c. hypertonic d. hypotonic e. none of these
The exchange of oxygen and carbon dioxide occurs in the human lungs in the ____
a. bronchi b. alveoli c. bronchioles d. trachea e. glottis
In meiosis the separated sister chromatids move to opposite poles of the cell during
A. metaphase I. B. metaphase II. C. anaphase I. D. telophase I. E. anaphase II.