Answer: anti-senescence.
- A anti-senescence
- B the ripening
- C the dormancy
- D the wilting
Correct answer: A. anti-senescence
Explanation: By delaying ageing, cytokinins keep leaves green (an anti-senescence effect).
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.