A gene created from the fusion of two gene fragments is considered a
A. regulatory gene.
B. tumor-suppressor gene.
C. chimeric gene.
D. proto-oncogene.
E. structural gene.
Answer: C
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Global air circulation patterns affect climate and the distribution of __________. Fill in the blank(s) with the appropriate word(s)
You are earning your Ph.D. in marine biology, studying the microbial ocean community. This year, you are shocked to discover that one of your study sites has become contaminated due to an industrial waste water pipe. This dumping is drastically raising the temperature and lowering the salinity of the water. What do you expect to find in your survey of the ecosystem, and what might you find in a survey years from now?
A. Most species will be wiped out this year, and in subsequent years even fewer will remain. B. The individuals will turn on genes to adapt to these changes, and the populations will end up largely the same this year and following years. C. Many species will have decreased or disappeared from this site, but later some species may increase in population if they acquire adaptive mutations. Also you may see some new species expand into the site. D. Most species will be wiped out this year, and it will take millions of years for new species to evolve -- until then the site will be devoid of life. 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 how an ecosystem reacts to pollution? 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?
The chromosomes have arrived at opposite poles during
a. anaphase. b. metaphase. c. interphase. d. prophase. e. telophase.
Given the very low pressure for the blood's return to the heart shown in section III, which of the following is NOT a mechanism for assisting blood's movement?
a. The presence of one-way valves embedded in the vein's walls b. A thoracic pump powered by breathing movements c. A transpirational pull using hydrogen bonding d. Skeletal muscle assists e. The reduced pressure in the relaxing heart chambers after the blood is forced out