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In a Rock Pool, a Student Encounters an Organism with a Hard

question 6

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In a rock pool, a student encounters an organism with a hard outer covering that contains much calcium carbonate, an open circulatory system, and gills. The organism could potentially be a crab, a shrimp, a barnacle, or a bivalve. The presence of which of the following structures would allow for the most certain identification of the organism?


Definitions:

Reaction Formation

A defense mechanism where individuals act in the opposite manner to which they truly feel, often to hide their true feelings.

Sublimation

A defense mechanism in which socially unacceptable impulses are transformed into socially acceptable actions or behavior.

Psychoanalyzed

A method of therapy and theoretical approach to understanding human behavior by exploring the unconscious mind, developed by Sigmund Freud.

Hostility

Feelings of anger and aggression towards others, which can be a symptom of underlying emotional issues or psychological conditions.

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