One of the Most Important Branch Points in the Evolution

question 46

Multiple Choice

One of the most important branch points in the evolution of animals and their nervous systems was the appearance of

• A) radial symmetry.
• B) bilateral symmetry.
• C) the spinal column.
• D) specialized cells for transmitting signals.

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Definitions:

Obsessive-Compulsive Disorder

A mental health disorder where individuals experience uncontrollable, recurring thoughts (obsessions) and behaviors (compulsions) they feel the urge to repeat repeatedly.

Generalised Anxiety Disorder

A mental health condition characterized by persistent and excessive worry about multiple aspects of life, beyond what might be considered reasonable.

Panic Disorder

A mental health condition characterized by sudden and repeated episodes of intense fear accompanied by physical symptoms like rapid heartbeat or dizziness.

Bipolar Disorder

A mental health condition characterized by extreme mood swings, including episodes of depression and mania.