To which of the following books does DNA
compare?
a. a novel
b. a mathematics textbook
c. a cookbook
d. a travel guide
e. a biography
C
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Infectious hepatitis (hepatitis A) is usually transmitted by
A. fecal-oral contamination of food or drink. B. contaminated blood. C. sexual activity. D. inhalation of droplets.
Upon finding a carcass, a raven will only call and attract other ravens to the food source if the ____
a. nearby ravens are relatives b. food source is large and plentiful c. food is found in a resident pair's territory d. food is found in his own territory e. food is being consumed by an animal of another species
In temperate-zone lakes, a __________ and a fall
overturn cause vertical mixing of waters and trigger a burst of productivity. Fill in the blank(s) with the appropriate word(s).
The contents of a bottle labeled "Tincture of iodine" is
A) an alcohol solution of iodine. B) a variety of organic compounds containing iodine. C) also known as betadine. D) a mixture of iodine and chloramine. E) a detergent solution of iodine.