Which of the Following Is NOT One of the Eras

question 25

Multiple Choice

Which of the following is NOT one of the eras within the Phanerozoic eon?

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

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Definitions:

Tympanic Membrane

The thin membrane that separates the outer ear from the middle ear, also known as the eardrum, which vibrates in response to sound waves.

Eardrum

A delicate layer dividing the outer ear from the middle ear, which moves in reaction to sound vibrations.

Temporal Bone

A bone on the side of the skull that houses structures of the ear and is part of the cranium.

Pinna

The external part of the ear in humans and many animals, which serves to collect and direct sound waves toward the ear canal.