- A A plant's photoperiodic response to the relative length of day versus night
- B Requirement for cold treatment to induce flowering
- C Application of elevated temperature treatment to accelerate vegetative growth
- D Prolonged exposure to drought stress that triggers stomatal closure
Correct answer: B. Requirement for cold treatment to induce flowering
Explanation: Vernalization: plants require prolonged cold treatment (winter) to acquire the ability to flower in spring. Promotes flowering in wheat, barley.
Concept context
Phases of plant growth, the five classical plant hormones plus newer ones, photoperiodism, vernalization, and seed dormancy.