Question

which is a disadvantage of using genetic engineering?
○ reduced effectiveness of pesticides
○ more pharmaceuticals
○ edible vaccines
○ drought and salinity tolerance

Explanation:

To determine the disadvantage of genetic engineering, we analyze each option:

• "More pharmaceuticals" is an advantage as it helps in drug production.
• "Edible vaccines" are a positive application for easier vaccine delivery.
• "Drought and salinity tolerance" in crops is an advantage for agriculture.
• "Reduced effectiveness of pesticides" occurs when pests develop resistance due to genetic engineering (e.g., genetically modified crops leading to pest resistance), making pesticides less effective, which is a disadvantage.

Answer:

A. reduced effectiveness of pesticides