List Three Major Evolutionary Changes That Occurred in Animals,leading to Greater

question 21

Essay

List three major evolutionary changes that occurred in animals,leading to greater complexity and specialization.

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Definitions:

Hypochondriasis

A psychological disorder wherein an individual is excessively worried about having a serious illness, often misinterpreting normal bodily functions as symptoms of serious conditions.

Conversion Disorder

A mental condition in which a person experiences physical neurological symptoms, such as blindness or paralysis, without a physical cause, believed to stem from emotional conflict.

Catatonic Schizophrenia

A subtype of schizophrenia characterized by significant motor disturbances, ranging from physical immobility to excessive motor activity, and often accompanied by other symptoms such as echolalia or echopraxia.

Goes Rigid

The act of becoming extremely stiff or inflexible, often as a physical or emotional response.