What is another name for the polymers of carbohydrates?
A. Triglycerides
B. Nucleotides
C. Polypeptides
D. Polysaccharides
Answer: D
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It is difficult to estimate when cyanobacteria appeared on Earth using evidence from the oxidation state of the Earth's crust, because
A) several abiotic reactions could have formed Fe3+. B) there are multiple forms of anoxygenic photosynthesis. C) there are multiple groups of oxygenic photosynthetic bacteria. D) several ancient anaerobic metabolisms form Fe3+.
The transition between the continental shelf and the deep floor is called
a. midocean. b. continental slope. c. shelf break. d. continental margin.
In a forensic test done using two loci, the chance of a match between the two samples from one locus
is 1 in 400, and at the second locus it is 1 in 1000. The overall probability that the two samples match by chance is ____________________. Fill in the blank(s) with the appropriate word(s).
Derived character states shared by clade members are called
A. symplesiomorphies. B. ancestral traits. C. homoplasies. D. plesiomorphies. E. synapomorphies.