What were the tools of Cro-Magnon man made from?
A. metal
B. wood
C. wood that had been hardened in a fire to increase its strength
D. stone
E. No answer choice is correct.
Answer: D
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Reactive oxygen species are detoxified by a general category of molecules referred to as ____
Fill in the blank with the appropriate word.
A stop codon
A. codes for the stop amino acid s-methyl-methionine. B. forms a hairpin loop forcing the ribosome to fall off. C. codes for no amino acid. D. enhances the binding of the e-polymerase. E. codes for the stop amino acid s-methyl-methionine AND forms a hairpin loop forcing the ribosome to fall off.
The total solute concentration of a solution of water and other substances (salts, proteins, etc.) is referred to specifically as its
A. osmolarity. B. tonicity. C. salinity. D. specific gravity. E. density.
Which of the following becomes more abundant deeper into the conducting zone (from bronchi to bronchioles)?
A) cilia B) type I alveolar cells C) cartilage D) goblet cells E) smooth muscle