Which type of enzyme is most likely to be involved in the loss of fat during exercise?
A. carbohydrase
B. lipase
C. protease
D. trypsin
B. lipase
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A colony of mice is treated with a noninfective form of the bacterium Streptococcus pneumoniae. A
new researcher exposes this noninfective form to heat-killed cells of an infective strain. What would be the effect of this action in the mouse population?
a. The mice will all remain healthy. b. Some mice will die, but most will live. c. The mice will get sick with pneumonia. d. Some will get sick with pneumonia, but most will live. e. The mice will become immune to the bacterium.
What limits the size of a cell?
a. lack of building materials b. the size of the organism c. the relationship between the volume of the cell and its surface area d. the job it does e. the materials it has to exchange
Which of the following is/are true about natural selection?
A. On average, it favors the survival of individuals that have adaptive characteristics. B. It acts on genotypes rather than phenotypes. C. It always selects for more complex forms. D. It assures the survival of every fit individual. E. All of the choices are correct.
The structure that attaches a chromosome to a microtubule is called a(n)
a. centriole. b. MAR. c. kinetochore. d. spindle. e. MTOC.