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The typical growth curve of a plant or organ is
Alinear throughout life
Bsigmoid: lag, log, and stationary phases
Cstep-wise, only at night
Dpurely exponential, never plateauing
Answer & Solution
Correct answer: B. sigmoid: lag, log, and stationary phases
Most growth in plants follows an S-shaped (sigmoid) curve: a slow lag phase, a rapid logarithmic phase, then a stationary plateau when resources or hormones limit further growth. Pure linear or pure exponential growth doesn't account for the final slow-down.
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