Which statement is true about delayed pesticide effects?

• A. Delayed effects appear weeks, months or years later
• B. Acute effects occur within minutes or hours after exposure
• C. Allergic effects require prior exposure
• D. All are false

Answer: (A)

Delayed pesticide effects are health impacts that don’t show up right away after exposure. The statement that they appear weeks, months, or years later is the best answer because many pesticides can lead to outcomes that develop with a long latency, such as certain cancers or chronic health effects, rather than immediate symptoms.

Acute effects, in contrast, occur within minutes or hours after exposure, so that describes a different timing pattern. Allergic effects typically require prior exposure to sensitize the immune system, but that describes a different mechanism and timing than delayed effects. Therefore, the statement about delayed effects appearing long after exposure is the accurate one.