If you supply cannabis plants with more than 12 hours of light per day, then they will:

Question

BlackTom AI · Accepted Answer

Cannabis is a short-day (long-night) plant: it requires a sufficiently long uninterrupted dark period to trigger the hormonal change that initiates flowering. Photoperiod-responsive cannabis plants remain in vegetative growth when nights are too short.

1) Relevant knowledge points and concepts
- Photoperiodism: many plants use day/night length to time flowering. Cannabis is typically short-day: flowering begins when dark period exceeds a critical length (around 12 hours for many cultivars).
- Vegetative vs. flowering stages: vegetative growth occurs under long-day/short-night schedules (e.g., 18 h light / 6 h dark); flowering is usually induced by 12 h light / 12 h dark or longer nights.
- Exception: autoflowering varieties flower with age independent of light cycle.

2) Step-by-step reasoning
- The day length condition given: "more than 12 hours of light per day."
- Compute the corresponding dark period: dark hours = 24 − light hours.
  Example calculations:
  - If light = 13 h, dark = 24 − 13 = 11 h (dark < 12 h).
  - If light = 18 h, dark = 24 − 18 = 6 h (dark < 12 h).
  - If light = 24 h, dark = 0 h (dark << 12 h).
- For photoperiod cannabis, flowering is triggered when dark ≥ ~12 hours. In each example above the dark period is less than 12 hours, so the flowering trigger is not met.

3) Intermediate steps shown above (light → subtract from 24 → dark hours → compare to 12-hour threshold).

4) Why the correct answer is correct
Because supplying more than 12 hours of light necessarily gives less than 12 hours of darkness, the plant does not experience the long-night signal needed to switch from vegetative to flowering growth. Therefore it will stay in the vegetative stage.

5) Why other options are incorrect
- "start to flower": incorrect for photoperiod strains because nights are too short to induce flowering. It would only be correct if light were reduced to ~12 h or if the plants were autoflowering.
- The options labeled "No answer text provided." are non-answers and thus incorrect.

6) Conclusion
Given the photoperiod mechanism and the arithmetic shown, the correct outcome is that plants will stay vegetative — confirming the provided answer: "stay vegetative."

If you supply cannabis plants with more than 12 hours of light per day, then they will:Single choice

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