James Ferris discovered that clay minerals are capable of ________

A) joining pyrimidines to simple sugars
B) catalyzing the polymerization of activated nucleotides
C) breaking down biomolecules to release energy
D) activating nucleotides by adding phosphate groups
E) forming microscopic spheres from short polymers of amino acids


B

Biology & Microbiology

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Meiosis in a diploid organism typically results

in the production of

a. two diploid cells. b. four diploid cells. c. four haploid cells. d. two haploid cells. e. one triploid cell.

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Which of the following is a normally correct base pairing in transcription? 

A. (DNA)A...U(mRNA) B. (mRNA)C...G(tRNA) C. (DNA)U...A(mRNA) D. (DNA)A...T(tRNA)

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An analysis of derived characters is used to generate a

a. family tree based on external appearance b. family tree based on DNA structure c. cladogram d. traditional classification system

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Not all human activities contribute to heating of the atmosphere. Which of the following has a net effect favoring atmospheric cooling?

A) production of CO2 B) production of methane, nitrogen oxides, and chlorinated hydrocarbons C) production of ozone D) effects on albedo of the earth's surface E) all of the above

Biology & Microbiology