What is an advantage of the economy of scale?
a. division of labor c. sexual reproduction
b. ability to eat more food d. multicellularity
A
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Which combination of conditions would increase the rate of diffusion through a semipermeable membrane the most? I. steeper concentration gradients II. higher temperatures III. larger molecules
a. I only b. II only c. I and II d. II and III e. I, II, and III
Manatees are mostly found in:
a. cold polar waters. b. Antarctica. c. tropical estuaries. d. temperate coastal areas. e. Eastern Pacific Ocean.
A small group of mice were released on an island. The island previously had no mice on it, but had abundant food and no predators. After several years of growth, the size of the new island population stabilizes. However, at this point a hurricane drastically reduces the population. How would you describe the situation?
A. The biotic potential of the population has been reduced. B. The new population size is a result of density-dependent regulation. C. The new population size is a result of density-independent regulation. D. The island mouse population can now act as a sink metapopulation. E. The island mouse population can now act as a source metapopulation. Clarify question: What is the key concept addressed by the question? What type of thinking is required? Gather Content: What do you already know about natural event affecting a population? What other information is related to the question? Choose Answer: Given what you now know, what information is most likely to produce the correct answer? Reflection on Process: Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
Radioisotopes have a number of uses in science and medicine. These uses include which one of the following?
A) repairing damaged heart tissue B) dating fossils and treating cancer C) providing the power supply in heart pacemakers D) treating asthma and regulating nerve transmission E) curing diabetes