mdcat logical reasoning MCQ #438

If photosynthesis requires light, and night has no light, what follows?

mdcat logical reasoning MCQ #438

  1. Question 1

    Q1. If photosynthesis requires light, and night has no light, what follows?

    • A) Photosynthesis stops at night
    • B) Plants store energy at night
    • C) Night plants use geothermal energy
    • D) Photosynthesis is independent of light

    Answer: Photosynthesis stops at night

    Explanation: Modus tollens applied. B/C/D introduce unproven alternatives. Photosynthesis stops at night is correct because it matches what the question requires. USAT, HAT and MDCAT analytical sections repeat this pattern.