The best microscope to use to view surface features
of specimens is the
a. basic light microscope.
b. phase contrast light microscope.
c. Nomarski process light microscope.
d. scanning electron microscope.
e. transmission electron microscope.
Answer: d
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For microbial biodiversity studies, it is common to identify the ________ rather than the ________ as a measure of biodiversity
A) organisms themselves / genes B) genes / organisms themselves C) cell types / genes D) cell types / organisms themselves
The first part of a new polypeptide chain being produced in a eukaryotic cell has a signal peptide. Translation of this
polypeptide ____.
a. occurs on a free ribosome in the cytosolb. begins on a free ribosome in the cytosol and is completed on the rough ER c. occurs in the Golgi apparatus d. begins on the rough ER and is completed in the Golgi apparatus e. occurs on the rough ER
What characterizes nekton? a. Ability to swim strongly against currents
b. All of these choices. c. Relatively high consumption. d. Highly productive organisms.
Disruptive selection occurs when
A. the environment controls which organisms will survive. B. humans determine which organisms will survive. C. the extremes of the population have a lesser chance to survive. D. the extremes of the population have a better chance to survive. E. the organisms on one extreme of the population have a better chance to survive than those on the other extreme.