At the Base of the Evolutionary Tree of All Life

question 17

Multiple Choice

At the base of the evolutionary tree of all life is the

• A)universal ancestor.
• B)convergent ancestor.
• C)derived ancestor.
• D)descended ancestor.

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Definitions:

Basal Ganglia

A group of structures in the brain involved in the coordination of movement as well as aspects of learning and emotion.

Thalamus

A major part of the brain situated at the top of the brainstem, serving as a key relay station for sensory signals except for the sense of smell.

Limbic System

A complex system of nerves and networks in the brain, involved with instinct and mood, controlling basic emotions and drives.

Cognition

encompasses all aspects of intellectual functions and processes related to knowing, including perceiving, recognizing, conceiving, and reasoning.