Populations will eventually become resistant to pesticides and antibiotics with overuse.

• A. Gene Mutation
• B. Antibiotic and Pesticide Resistance
• C. Haploid
• D. Karyotype

Answer: (B)

Overuse of pesticides and antibiotics creates a strong selective pressure on a population. Within that population, some individuals naturally carry genetic traits that confer resistance. Those individuals survive and reproduce, passing the resistance on to their offspring. As generations pass, the frequency of resistance traits increases, and the population as a whole becomes resistant. This phenomenon is called antibiotic and pesticide resistance.

Gene mutation is a mechanism that can produce resistance, but the question describes the overall outcome—the population becoming resistant. Haploid and karyotype are unrelated terms here: haploid refers to a single set of chromosomes, and a karyotype is a chart of chromosomes, neither of which explain the population-wide resistance pattern.