Diagnosis of West Nile virus infection is through detection of
A. viral growth in cell cultures.
B. PCR analysis from saliva samples.
C. a rise in neutralizing antibody in a patient's serum.
D. culture on artificial media.
Answer: C
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As you stroll through a moist forest, you are most likely to see a _____
A) zygote of a green alga B) gametophyte of a moss C) sporophyte of a liverwort D) gametophyte of a fern
The ____ is a flaplike structure that helps prevent food from entering the windpipe
a. uvula b. pharynx c. larynx d. epiglottis e. esophagus
Using radioactive tracers to determine the interactions of bacteriophages and their host bacteria, Hershey and Chase demonstrated without question that
A.) genes are composed of protein molecules. B.) DNA and proteins are actually the same molecules located in different parts of cells. C.) bacteria inject their DNA into the cytoplasm of bacteriophages. D.) DNA is the molecule that stores genetic information in cells.
Which of the following is an example of predation?
a) a mosquito feeds on the blood of a human b) a protist breaks down cellulose in the gut of a termite c) a remora hitches a ride on the fin of a shark d) a lion hunts and eats a zebra for food