Question

What are labelled phases A, B ans C in given sigmoidal growth curve?

• A. A : Stationary, B: Log, C: Lag
• B. A: Lag, B: Stationary, C: Log
• C. A: Log, B; Lag, C: Stationary
• D. A: Lag, B: Log, C: Stationary

Answer 1

Answer: (D)

A: Lag, B: Log, C: Stationary

When a graph is plotted taking into consideration time on one hand and growth rate on the other hand, a 'S' shaped curve is obtained. It is called "grand period of growth". This curve mainly shows four phases of growth -
1. Initial slow growth (lag phase) .

2. The rapid period of growth (log phase), where maximum growth is seen in a short period.
3. The diminishing phase, where growth will be slow.
4. Stationary phase, where finally growth stops.