Refer to the Figure

question 179

Multiple Choice

Refer to the figure. A long, narrow hybrid zone exists in Europe between the ranges of the fire-bellied toad and the yellow-bellied toad.The persistence of this zone can be attributed to which factor?

• A) Hybrid fitness is high, but reinforcement strengthens the prezygotic barriers between the two species.
• B) Hybrid offspring have the same fitness as non-hybrid offspring.
• C) Both species travel long distances over the course of their lives.
• D) Hybrid fitness is low, but individuals from outside the hybrid zone regularly move into the hybrid zone.
• E) An adaptive radiation is occurring.

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Definitions:

Variable Overhead

Costs of indirect production materials or services that fluctuate with the level of production activity, such as utilities for a factory.

Direct Labor-hours

The amount of labor time spent by workers directly involved in the manufacturing process, restated as "The quantity of labor time directly utilized in producing goods."

Variable Overhead Efficiency Variance

The difference between the actual variable overhead based on the standard cost and the variable overhead applied to production based on actual activity levels.

Direct Labor-hours

The total hours of labor directly involved in the production of goods or services.