The trade-off between investments in current reproduction and in growth that promotes future reproduction is referred to as the total cost of what?
A. genetic change
B. fitness
C. selection
D. reproduction
E. adaptation
Answer: D
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In the process of isolating DNA for transcription and translation, you digest the DNA with BamHI and ligate the gene into a plasmid vector. However, even though all of the controls work, no transcription is obtained using your fragment. Working backward, you note that restriction digestion has removed approximately 250 base pairs from the 5' end of the gene. It is possible that during restriction
digestion A) the termination signal was removed. B) the RNA polymerase became inactivated. C) primase could not bind. D) the promoter was removed E) none of the above
What is the role of the lysosome in intracellular digestion?
a. absorption b. enzymatic digestion c. filtration d. mechanical digestion e. energy production
The base of the food web in the deep sea is:
a. phytoplankton. b. algae. c. seagrasses. d. sinking dead matter. e. viruses.
Living organisms are members of all of the
levels listed below. However, soil is a component of
a. the community. b. the population. c. the ecosystem. d. the biosphere. e. both the community and the biosphere.