Salmon fisheries are located in the coastal waters of:
a. Alaska.
b. New England.
c. the Pacific Northwest.
d. China.
e. both a and c
D
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Which of the following organs of cephalopods resemble those of the vertebrates?
A. arms B. nephridia C. eyes D. digestive tissues E. foot
FRAP has revealed that some proteins move in cell membranes much slower than they move in reconstituted liposomes. Which of the following could account for limited mobility of proteins in cell plasma membranes?
A) association with other proteins in a large complex. B) association with lipid rafts. C) anchorage to the extracellular matrix. D) anchorage to the cell cytoskeleton. E) All could limit protein mobility.
To join a fragment of human DNA to bacterial or yeast DNA, both the human DNA and the bacterial or yeast DNA must first be treated with the same
A) DNA ligase. B) DNA gyrase. C) restriction enzyme. D) DNA polymerase.
Which of these can be concluded from the figure below?
A) In some years of the study the mean poison ivy biomass decreased to the level it was at the beginning of the study.
B) There were more elevated CO2 plots than control plots.
C) Not all of the increase in mean poison ivy biomass can be attributed to the CO2 that the researcher added.
D) Poison ivy in the experimental plots was more toxic than that in the control plots.