Answer: Stomatal closure and dormancy.
- A Rapid stem elongation and internode growth
- B Triggering of seed germination processes
- C Stomatal closure and dormancy
- D Acceleration of fruit ripening and softening
Correct answer: C. Stomatal closure and dormancy
Explanation: ABA is a stress hormone. It causes stomatal closure (water stress) and promotes seed/bud dormancy. Known as stress hormone.
Geometric growth (where both daughter cells keep dividing) produces this classic S-shaped curve: a slow lag phase, a rapid exponential phase, and a levelling-off stationary phase as nutrients or space become limiting - the same fundamental pattern seen in population growth.
Concept context
Phases of plant growth, the five classical plant hormones plus newer ones, photoperiodism, vernalization, and seed dormancy.