Which component of a nerve cell provides electrical insulation for signals that are travelling along the axon?
a. astrocytes
b. dendrites
c. oligodendrocyte
d. soma
c. oligodendrocyte
Biology & Microbiology
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The preferential selection by a female of a male peacock with the longest tail feathers and the most eyespots on the tail feathers is an example of
A) polandry. B) polygyny. C) intrasexual selection. D) intersexual selection.
Biology & Microbiology
Long-distance transport of oxygen to the cells of animals is facilitated by the
A) brain. B) heart. C) stomach. D) mouth.
Biology & Microbiology
Deserts often occur in the rain shadow of mountain ranges
Indicate whether the statement is true or false
Biology & Microbiology
At which point in the graph do voltage-gated potassium channels open?
A) A B) B C) C D) D E) E
Biology & Microbiology