Which Period Would Hold the Record of the Oldest Fossils

question 59

Multiple Choice

Which period would hold the record of the oldest fossils of multicellular animals, found in mountainous areas of South Australia, and parts of Canada and China?

• A) Edicarian
• B) Devonian
• C) Cambrian
• D) Cretaceous
• E) Ordovician

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Definitions:

Perspective

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Serotonin

A neurotransmitter in the brain that plays a key role in stabilizing mood, feelings of well-being, and happiness.

Neurotransmitter

Chemical messengers used by the nervous system to transmit messages between neurons or from neurons to muscles.

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