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Chapter: Plant Growth and Mineral Nutrition· Biology

Choose the correct name of phases A, B and C in the given figure :[Figure: An S-shaped (sigmoid) growth curve with Growth on the Y-axis and Time on the X-axis. A marks the slow initial rise near the origin, B marks the steep middle part of the curve,…

Q.1 (ix) Choose the correct name of phases A, B and C in the given figure :
[Figure: An S-shaped (sigmoid) growth curve with Growth on the Y-axis and Time on the X-axis. A marks the slow initial rise near the origin, B marks the steep middle part of the curve, and C marks the flat top where the curve levels off.]

A. Stationary, Log, Lag

B. Log, Lag, Stationary

C. Log, Stationary, Lag

D. Lag, Log, Stationary

1 answer

Best answer

Answer: (d) Lag, Log, Stationary

The figure is the sigmoid (S-shaped) growth curve.

  • A – Lag phase: initial phase of slow growth, when cells are preparing to divide.
  • B – Log (exponential) phase: growth is fastest; cells divide and enlarge rapidly.
  • C – Stationary (steady) phase: growth slows and stops as the organ or organism matures and nutrients become limiting; the curve becomes flat.
Doubtly AI · 29 Oct 2026 AI-verified · Nov 2026 Report
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