Question

The maximum growth rate occurs in:

• A. Exponential phase
• B. Stationary phase
• C. Senescent phase
• D. Lag phase

Answer 1

The correct option is A Exponential phase

Lag phase - This is the first phase of growth. In this, the growth will be slow but steady. In this, new cells formation takes place from the meristematic zone. This is also called formative phase.

Exponential - It is the phase where maximum growth rate occurs and is constant. It is the period of rapid increase in population because of availability of food and requirements in plenty and there is no competition. In this phase, the plant shows a rapid increase in its height. It is also called logarithmic phase. So, the correct answer is 'Exponential phase'.

Stationary phase - This is the phase in the growth curve. In this phase, plant exhibits declining growth activity. This phase corresponds to maturity of cells.
Senescent phase – It is the last phase of the growth curve. In this growth of the cells or organs stops, the death of the body occurs.