What Is the Main Reason Why the Rhagoletis Flies That

question 243

Multiple Choice

What is the main reason why the Rhagoletis flies that prefer apple and those that prefer hawthorn have not collapsed into a single species?

• A) There are no geographic barriers present.
• B) There are geographic barriers are present.
• C) There is no intermediate plant species between an apple and a hawthorn tree.
• D) Apple and hawthorn trees are closely related.
• E) The flies have different numbers of chromosomes.

---

Definitions:

Total Revenue

The total income received by a company from its sales of goods or services before any expenses are subtracted.

Output Range

The spectrum of quantities of goods or services that a company can produce under certain conditions or within a specified period.

Elastic Demand

Refers to a market scenario where the quantity demanded of a product changes significantly when its price changes.

Marginal Revenue

The increase in revenue that results from the sale of one additional unit of a product or service.