The Common Edible Frog of Europe Is a Hybrid Between

question 16

Multiple Choice

The common edible frog of Europe is a hybrid between two species, Rana lessonae and Rana ridibunda. The hybrids were first described in 1758 and have a wide distribution, from France across central Europe to Russia. Both male and female hybrids exist, but when they mate among themselves, they are rarely successful in producing offspring. What can you infer from this information?

• A) These two species are likely in the process of fusing back into one species.
• B) The hybrids form a separate species under the biological species concept.
• C) Postzygotic isolation exists between the two frog species.
• D) Prezygotic isolation exists between the two frog species.

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Definitions:

APS

Assumes "APS" refers to "Average Propensity to Save," which is the proportion of total income or output that is saved rather than spent on consumption.

Induced Consumption

Refers to the portion of consumer spending that increases or decreases in response to changes in income.

Disposable Income

The pot of funds households have at their disposal for saving and spending, post-income tax.

MPC

refers to the Marginal Propensity to Consume, which is the fraction of additional income that a household spends on consumption.