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Which Subphylum Includes Members That Are Now All Extinct, but That

question 152

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Which subphylum includes members that are now all extinct, but that were once extremely numerous in shallow Paleozoic seas?


Definitions:

World

The earth and all life on it, or the realm of human existence and activity.

Evolutionary Psychology

A method in the social and natural sciences focusing on the study of psychological frameworks from a current evolutionary standpoint.

Psychology Defined

The scientific study of the mind and behavior, encompassing various aspects of conscious and unconscious experience as well as thought and emotion.

Insight Therapies

Forms of psychotherapy aiming to increase patients' understanding of themselves and their issues or behaviors.

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