The Following Questions Refer to the Paragraph and Graphs Below

question 34

Multiple Choice

The following questions refer to the paragraph and graphs below.
In a hypothetical situation, the National Park Service, which administers Grand Canyon National Park in Arizona, builds a footbridge over the Colorado River at the bottom of the canyon. The footbridge permits interspersal of two closely related antelope squirrels. Previously, one type of squirrel had been restricted to the terrain south of the river, and the other type had been restricted to terrain on the north side of the river. Immediately before and ten years after the bridge's completion, ten antelope squirrels from both sides of the river were collected, blood samples were taken, and frequencies of alleles unique to the two types of antelope squirrels were determined (see graphs below) .


-Speciation

---

Definitions:

Accrual Basis Accounting

Revenues are recognized when goods and services are provided to customers, and expenses are recognized in the same period as the revenues to which they relate, regardless of when cash is received or paid.

Revenues

The total amount of money received or expected to be received by a company from its business activities, such as the sale of goods or services, before any expenses are deducted.

Expenses

Costs incurred in the process of earning revenue; general operational costs of a business.

Operating Revenue

Revenue earned from a company’s primary business activities, excluding items like investment revenue.