MDCAT Biology MCQ #3590

A species of bacteria develops resistance to an antibiotic. What is the primary mechanism behind this adaptation?

MDCAT Biology MCQ #3590

  1. Question 1

    Q1. A species of bacteria develops resistance to an antibiotic. What is the primary mechanism behind this adaptation?

    • A) Horizontal gene transfer
    • B) Vertical gene transfer
    • C) Natural selection
    • D) Genetic drift

    Answer: Horizontal gene transfer

    Explanation: Horizontal gene transfer allows for rapid sharing of resistance genes, unlike vertical transfer.