Which of the following is not an end product for an acetyl group that enters the citric acid cycle?
A. ATP
B. NADH
C. FADH2
D. CO2
E. oxaloacetate
E
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Reciprocal translocations can affect gene dosage because:
A. the genes involved in the translocation are nonfunctional. B. the two chromosomes involved in the translocation may not assort together during meiosis. C. the two chromosomes involved in the translocation always assort together during meiosis. D. reciprocal translocation involves the duplication of one set of genes and the deletion of another set of genes. E. none of these
Answer the question using the accompanying figure. According to the graph, the upper mean annual temperature for
boreal forests is approximately ____oC.
a. -7 b. 2 c. 15 d. 25 e. 35
Which one of the following sequences is CORRECT in terms of level of organization from least to most complex?
A) cells, tissues, organs, organ systems, organism B) atoms, cells, organs, community, population C) atoms, cells, organism, organ systems, ecosystem D) tissues, organ systems, population, cells, organism
The half-life of a radioactive isotope is 10,000 years. This isotope and its breakdown product do not normally occur together before molten rock cools and becomes solid. You analyze a volcanic rock and find 25 percent of the original amount of
radioactive isotope remains, and 75 percent has decayed to its daughter element. How long ago did the rock solidify? A) 2,500 years ago B) 20,000 years ago C) 50,000 years ago D) 10,000 years ago