What happens to the metabolic rate of an average pregnant woman?
Answer: decreases 20-30 percent
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Viral envelopes can best be analyzed with which of the following techniques?
A) use of 15N to label specific nucleotides B) antibodies against specific proteins not found in the host membranes C) DNA staining and visualization with the light microscope D) use of plaque assays for quantitative measurement of viral titer E) immunofluorescent tagging of capsid proteins
Which biome has the most biomass per unit area?
A) boreal forest B) tundra C) temperate forest D) tropical forest
The field of ________ is a thoroughly modern discipline that has led to new ways to treat infectious disease
A) recombinant DNA technology B) epidemiology C) immunology D) serology E) biochemistry
What object from the first stage regression (of two-stage least squares) is critical to incorporate in your implementation of the second stage regression?
A. The estimated coefficient for the treatment variable from the first stage. B. The estimated residuals for the treatment variable from the first stage. C. The estimated residuals for the endogenous variable from the first stage. D. The estimated predictions for the endogenous variable from the first stage.