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

Biology & Microbiology

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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.

Biology & Microbiology

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.

Biology & Microbiology

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.

Biology & Microbiology

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

Biology & Microbiology