During Which Geological Era Did Life First Appear on the Planet

question 56

Multiple Choice

During which geological era did life first appear on the planet?

• A)Precambrian
• B)Paleozoic
• C)Mesozoic
• D)Cenozoic

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Definitions:

Dendrites

Branched extensions of a neuron that receive signals from other neurons.

Axon

A long, slender projection of a nerve cell, or neuron, that conducts electrical impulses away from the neuron's cell body to other neurons, muscles, or glands.

Local Potential

Small changes in membrane potential that are localized and can lead to the generation of an action potential if threshold is reached.

Resting Membrane Potential

The electrical charge difference across the cell membrane when the cell is not conducting electrical signals, maintaining a negative charge inside relative to the outside.