Signals from the __________ of the brain send
__________ signals per minute when a person is at
rest.
a. medulla oblongata; 10-14
b. slit level; 35-45
c. frontal lobe; 1-5
d. occipital lobe; 1-9
e. none of these
Answer: a
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Diatom shells are of use to nanotechnologists because they build precise, intricate three-dimensional structures in large quantity.
Answer the following statement true (T) or false (F)
The most likely reason that glucose dissolves in water is that it is ____
a. an ionic compound b. a polysaccharide c. polar and forms many hydrogen bonds with the water molecules d. an extremely unstable molecule e. highly nonpolar
RNA nucleotides are linked by the enzyme _____________.
Fill in the blank(s) with the appropriate word(s).
There is a range of color in mice from black to brown to gray to white. In a region of white sand there is a black volcanic deposit. The white mice survive better on the white sand and the black mice survive better on the black volcanic deposit. This could be an example of
A. sexual selection. B. disruptive selection. C. directional selection. D. stabilizing selection.