Question

Typical growth curve in plants is

• A. stair-steps shaped
• B. parabolic
• C. sigmoid
• D. linear.

Answer 1

The Correct Option is C

Geometric growth cannot be sustained for long in natural condition. Limited nutrient availability slows down the growth. It leads to a stationary phase or even a decline. Plotting the growth against time, gives a typical sigmoid or S-curve. Sigmoid curve of growth is typical of most organisms in their natural environment including plants. The exponential growth can be expressed as:
W1= W0ert;
where
W0=initial size at the beginning of the period
W0=initial size at the beginning of the period
r=growth rate
t=time of growth
e=base of natural logarithms
As idealised sigmoid growth curve is drawn below: