When Two Frog Species, Rana Pipiens and Rana Sylvatica, Mate

question 42

Multiple Choice

When two frog species, Rana pipiens and Rana sylvatica, mate, the offspring die early in embryonic development. This is an example of ________.

• A)hybrid sterility
• B)mechanical isolation
• C)reduced hybrid viability
• D)reduced hybrid fertility

---

Definitions:

Contribution Margin

The sales price minus the variable costs of a product, indicating how much selling one more unit adds to profit.

Variable Costs

Costs that vary directly with the level of production or volume of output, such as raw materials and direct labor.

Fixed Costs

Costs that remain constant regardless of the volume of goods or services produced by a business.

Net Income

The total profit of a company after operating expenses, taxes, and all other incomes and expenses have been deducted from total revenue.