Information gathered from observing a plant grow 3 cm over a two-week period is called
A) variables.
B) inferences.
C) hypotheses.
D) data.
Ans: D) data.
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Lipids are the only class of macromolecules that contain:
A. amino acids. B. nucleotides. C. fatty acids. D. phosphate groups. E. monosaccharides.
The third line of defense, or adaptive mechanisms, are different from innate mechanisms in
that ____________________.
a. white blood cells engulf antigens b. physiological barriers play a larger role in the defense c. antigens are involved d. B- and T-cells target specific antigens
All of the following are major components of the deep sea food web except:
a. detritus. b. nocturnal vertical migration to feed near the surface. c. larger predators feeding on the small deep sea organisms. d. photosynthesis. e. scavenging.
On a molecular level, all organisms
a. show no similarities. b. have the same bases in DNA and RNA, the same amino acids in proteins, but use different genetic codes. c. use different means of storing genetic information. d. have the same bases in DNA and RNA, the same amino acids in proteins, and use the same genetic code. e. have the same bases in DNA and RNA, but different amino acids in proteins.