Which of the Following Is Not a Basic Theory of Biology

question 3

Multiple Choice

Which of the following is not a basic theory of biology?

• A) theory of ecosystems
• B) cell theory
• C) gene theory
• D) theory of evolution
• E) theory of gravity

---

Definitions:

Sales Volume

The quantity of units of merchandise sold or services rendered over a specific period.

Fixed Maintenance Cost

Costs that do not fluctuate with the level of production or sales, such as salaries for maintenance staff or contracts for equipment service, remaining constant over a period.

Machine-Hours

A unit of measure representing the operation of machinery for one hour, often used in manufacturing and production cost analysis.

Contribution Margin

The sum left from the revenue of sales once variable costs have been subtracted, utilized to pay for fixed expenses and create profit.