Which Group Did the Extinction at the End of the Pleistocene

question 19

Multiple Choice

Which group did the extinction at the end of the Pleistocene most affect?

• A)only marine organisms
• B)terrestrial mammals weighing more than 40 Kg
• C)terrestrial mammals weighing less than 40 Kg
• D)marine mammals weighing more than 40 Kg
• E)all mammal groups equally

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Definitions:

Central Canal

A fluid-filled channel in the center of the spinal cord or in the bone marrow where it serves different roles including housing blood vessels or nerves.

Visual Information

Data received by the eye and processed by the brain to construct a visual representation of the surrounding environment.

Occipital

Pertaining to the occipital bone or the occipital region of the brain, involved in visual processing.

Meninges

The three layers of protective tissue (dura mater, arachnoid mater, and pia mater) covering the brain and spinal cord.