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Plant Growth and Development
Phases and Rate of Growth
1 question from 1 paper, each with its answer.
- question
- 1
- paper
- 1
- of Plant Growth and Development
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Concepts tested
- Sigmoid growth curve
All Questions
2004 AIPMT 1 question
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The maximum growth rate occurs in :-Growth of a cell, organ, plant or population follows a sigmoid (S-shaped) curve with three main phases.
Lag phase: growth is slow at first, as cells prepare to divide.
Exponential (log) phase: growth is very rapid; the number of cells or the size increases geometrically. The growth rate is maximum in this phase.
Stationary (steady) phase: growth slows down and stops because nutrients become limiting; this may be followed by senescence (decline).
So the maximum growth rate occurs in the exponential phase.