Question

In a growth curve of a plant, maximum growth is observed during ______ phase.

• A. lag phase
• B. senescent phase
• C. decline phase
• D. exponential phase

Answer 1

Answer: (D)

The mathematical curve which represents variation in growth rate is somewhat flattened S-shaped. curve, which can be differentiated into three I phases:
(i) lag phase when rate of growth is slow,
(ii) exponential phase (log phase) : when the growth rate becomes more and more rapid and reaches its maximum value,
(iii) stationary phase (steady state) when the nutrients become limiting and growth slows down. This phase indicates the maturity of growth system.