-Refer to Figure 11-8

question 190

Multiple Choice

-Refer to Figure 11-8.If YFE represents the full-employment level of output,what can we say about the state of the economy at Y₁?

• A) It is in equilibrium,but below full employment.
• B) It is in equilibrium,and therefore at full employment.
• C) It is in equilibrium,but above full employment.
• D) It is not in equilibrium,and output will increase.
• E) It is not in equilibrium,and output will fall.

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Definitions:

Geographic Isolation

Refers to populations of organisms that are separated from exchanging genetic material with other organisms of the same species by physical barriers.

Convergent Evolution

The process where organisms not closely related independently evolve similar traits as a result of having to adapt to similar environments or ecological niches.

Speciation

The evolutionary process by which populations evolve to become distinct species, through mechanisms such as natural selection, genetic drift, and geographical isolation.

Coevolution

The process by which two or more species influence each other's evolution over time through interactions such as predator/prey or mutualism.