The control in an experiment
a. makes the experiment valid.
b. is an additional replicate for statistical purposes.
c. reduces the experimental errors.
d. minimizes experimental inaccuracy.
e. is identical to the experimental group, but
eliminates the characteristic or treatment being
tested.
Answer: e
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Which of the following events occurs to a territory-holding male zebra finch when he hears the song of
the male zebra finch that holds the neighboring territory?
a. Cells in the nucleus of his forebrain fire frequently. b. The territory-holding male flies out to drive off the neighboring male. c. Cells in the nucleus of his forebrain do not respond to the song of the neighboring male. d. Testosterone levels in his blood rise measurably. e. The territory-holding male initiates a ritualized threat display that may culminate in an expansion of his territory into the neighbor's land.
Provide evidence to both support and refute the current existence of life on Mars? What will be an ideal response?
The flu is an example of a virus that spreads through
A. horizontal transmission B. vertical transmission
Any scientific information that appears in a written format is considered a primary source.
a. true b. false