In what year did Stanley Prusiner discover prions?
a. 1928
b. 1979
c. 1997
d. 1982
Answer: d. 1982
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Genetic variations in enzymes that metabolize drugs can produce a(n) ______________ range of drug responses
Fill in the blank(s) with correct word
Which major biome type contains most of Earth's biodiversity?
A) desert B) tundra C) grasslands D) forests
You are exploring a distant planet and find an interesting ecosystem in a lake of liquid methane. Tiny organisms, which you decide to call "quiddles", are able to use the methane to produce carbon sugars. Other organisms, which you call "widdles", consume the quiddles. You do some basic sampling and discover that an average widdle is twice as large as an average quiddle, but there are many more quiddles than widdles per square meter of the methane lake. You draw up the three types of ecological pyramids for the methane lake and send them via WarpSpeed Mail to the other members of the research team back on Earth. What types of pyramids will they find when they open the package? Check all that apply.
A. An inverted pyramid of energy B. An inverted pyramid of numbers C. A standard pyramid of energy D. A standard pyramid of biomass E. An inverted pyramid of biomass F. A standard pyramid of numbers
Which habitats should harbor snapping shrimp species with the greatest degree of genetic divergence from each other?
A) A1 and A5 B) A1 and B5 C) A5 and B5 D) Both A1/A5 and B1/B5 should have the greatest, but equal amounts of, genetic divergence.