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
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About 2/3 of a shark's brain is used for:
a. control of body movement. b. processing electrical currents from the water. c. olfaction. d. vision. e. processing water pressure differences.
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).
Use solar energy to synthesize carbohydrates, which serve as organic nutrient molecules for plants and all living things on Earth
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