A City Was Intensively Sprayed with the Chemical DDT to Control

question 57

Essay

A city was intensively sprayed with the chemical DDT to control houseflies. The number of houseflies was immediately greatly reduced. Each year thereafter, the city was sprayed again, but the flies gradually increased in numbers until 10 years later when they were as abundant as they were before the control program began. Provide an evolutionary explanation of what happened.

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Definitions:

Productivity

A measure of the efficiency of production, often calculated as the ratio of output to inputs used in the production process.

Productivity

The assessment of the effectiveness with which products and services are created, commonly measured by the amount of output for each input unit.

Output

The total amount of goods and services produced by an economic system, typically measured over a specific time period.

Productive Input

Resources, such as labor, materials, and machinery, used in the production process to create goods or services.