You can painlessly wade into a pool, but doing a belly flop off of the high diving board hurts because of
A. cohesion in water.
B. water's high boiling point.
C. water's high density.
D. water's neutral pH.
E. adhesion in water.
A. cohesion in water.
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Which of the following is not true of a myelin sheath? a. Myelin sheaths have numerous gated sodium channels
b. A myelin sheath is made up of Schwann cell neuroglia. c. A myelin sheath speeds up action potentials. d. It acts as an electrical insulator.
In the figure above, which number identifies the cell(s) or portion of the cell(s) that will respond to a
single photon?
a. 1 only b. 2 only c. 4 and 7 d. 5 and 8 e. 3 and 6
Which component of air pollution can react with sunlight to form chemicals similar to tear gas?
a. carbon dioxide b. nitric oxide c. sulfuric oxide d. chlorofluorocarbons e. ozone
What is the term for the single cotyledon within the kernels of cereal grains?
A. amyloplast B. dicot C. aleurone D. scutellum E. hypocotyl