Evolution by Natural Selection Involves a Grand Plan of Nature

question 34

True/False

Evolution by natural selection involves a grand plan of nature in which species are to become increasingly more perfectly adapted to their environments.

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Definitions:

Myelin Sheath

A fatty layer that surrounds the axons of some nerve cells, serving as insulation and increasing the speed at which nerve impulses are conducted.

Axons

Neuronal fibers that transmit electrical signals from the neuron's cell body to other cells, playing a critical role in the central nervous system's function.

Myelinated Axons

Axons that are covered with myelin, a fatty substance that speeds up the transmission of nerve impulses.

Action Potential

A rapid rise and subsequent fall in voltage or electrical charge across a cellular membrane, typical of neurons and muscle cells.