When Two Species of Stickleback Fish Each Live in Separate

question 112

Short Answer

When two species of stickleback fish each live in separate lakes, the two species are similar in shape, size, and the features of their gill rakers.When the two species inhabit the same lake, they differ in shape, size, and the number and length of their gill rakers.These morphological changes are examples of _______.

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Definitions:

Social Anxiety Disorder

A chronic mental health condition characterized by an intense fear of social situations due to perceived negative evaluation by others.

Specific Phobia

An intense, irrational fear of a specific object, activity, or situation that leads to significant distress or impairment in social, occupational, or other important areas of functioning.

Anxiety

A feeling of worry, nervousness, or unease, typically about an imminent event or something with an uncertain outcome.

Equipotentiality Premise

The presumption that all stimuli have an equal chance of becoming acquired phobias.