Why Are Pest Predator Populations So Adversely Affected by Broad-Spectrum

question 25

Multiple Choice

Why are pest predator populations so adversely affected by broad-spectrum pesticides?

• A) In general, predators are more susceptible to the pesticides
• B) There is less food for the predators when the pest species is destroyed
• C) Predators in higher trophic levels are more likely to be wiped out than lower trophic levels
• D) Broad-spectrum pesticides leave more residues than other pesticides and kill the predators
• E) Predator populations are not more likely to be adversely affected

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Definitions:

Contribution Margin Ratio

A financial metric that measures how a product's selling price covers variable costs, expressed as a percentage of sales revenue.

Unit Contribution Margin

Unit contribution margin is the difference between the selling price of a product and its variable costs, indicating how much each unit sold contributes to covering fixed expenses and generating profit.

Sales

The total revenue generated from goods or services sold by a company over a specified period.

Pretax Income

The amount of income earned by a business before any taxes have been deducted.