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