power plant of cells:
a. ribosomes
b. ATP
c. mitochondria
Answer: c. mitochondria
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Convergent evolution refers to:
A. the evolution of a different character more than once in separate groups. B. the evolution of the same character more than once in separate groups. C. the evolution of the same character in related groups. D. the evolution of a different character in related groups.
An anthropologist discovers the fossilized heart of an extinct animal. The evidence indicates that the organism's heart was large, was well-formed, and had four chambers, with no connection between the right and left sides
A reasonable conclusion supported by these observations is that the _____. A) animal had evolved from birds B) animal was endothermic and had a high metabolic rate C) animal was most closely related to alligators and crocodiles D) species had little to no need to regulate blood pressure
An effective way to increase the rate of the reaction A+B ? C would be to
A. add more C. B. remove the catalyst. C. add more A or B. D. decrease the temperature.
Which of the following is the largest component of the dry weight of a cell?
A. minerals B. salts C. organic compounds D. inorganic compounds E. water