Of the Three Species of Sea Urchins Shown,one Species Is

question 76

Essay

Of the three species of sea urchins shown,one species is considered allopatric with Echinometra lucunter and the other is considered sympatric with E.lucunter.Name the allopatric species and identify one factor that may have led to speciation between E.lucunter and the allopatric species.Next,name the sympatric species and identify one factor that may have led to speciation between E.lucunter and the sympatric species.

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Definitions:

Generalized Adjustment Syndrome

A model outlining the body's short-term and long-term reactions to stress, including stages of alarm, resistance, and exhaustion.

Parasympathetic

Part of the autonomic nervous system that conserves energy as it slows the heart rate, increases intestinal and gland activity, and relaxes sphincter muscles.

Sympathetic

Relating to the sympathetic nervous system, which is part of the autonomic nervous system responsible for the body's "fight or flight" response.

Fight-or-Flight

A physiological reaction to perceived harmful events, attacks, or threats to survival, preparing the body to either confront or flee from the situation.