The material responsible for transformation was shown to be DNA by
A. Watson and Crick.
B.
Avery, MacLeod, and McCarty.
C. Lederberg.
D. Stanley.
B
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Insects possess ____ , circulatory systems in which hemolymph completely "bathes" the organs and is not typically contained in distinct arteries or veins
Fill in the blank with the appropriate word.
From this figure and your knowledge of geological time scales, we can infer that:
1.Fossils found at point A are similar to those found at point B.
2.The rock formations of region B are much more recent than those of region C.
3.The rock layers and life forms found within are older as you move from layer D to layer A.
4.There are no generalizations to make. You have to carbon date everything regardless of what layer the fossil is found in.
A single protein strand folded into a stable,
functional domain represents a. primary structure. b. secondary structure. c. tertiary structure. d. quaternary structure. e. most macromolecules.
Which of the following can grow in a Petri plate on a laboratory table?
a. an anaerobic bacterium b. an aerobic bacterium c. viruses on an agar surface d. all of the above