Which of the following is (are) an important

influence(s) on the evolution of mammals?
a. continental movements
b. geographic isolation
c. competition between species
d. decline of the dinosaurs
e. all of these


Answer: e

Biology & Microbiology

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The mutant huntingtin protein is _____________________, meaning that it kills cells, such as those in the brain and

nervous system. Fill in the blank(s) with the appropriate word(s).

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Which of the following descriptions is consistent with the behavior of a cell that lacks a protein required for a checkpoint mechanism that operates in G2?

(a) The cell would be unable to enter M phase. (b) The cell would be unable to enter G2. (c) The cell would enter M phase under conditions when normal cells would not. (d) The cell would pass through M phase more slowly than normal cells

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