Q. Select the incorrect statement among the following.
Plant Growth and Development
Solution:
Geometric growth is quite common in unicellular organisms when growth is nutrient rich medium. Here, every cell divides. The daughter cells grow and divide, the grand daughter cells repeat the process and so on. Number of cells in initially small so that initial growth is slow. Later on, there is rapid growth at exponential rate (log or exponential growth).
Sigmoid Growth Curve : Geometric growth cannot be sustained for long. Limited nutrient availability slows down the growth. It leads to stationary phase. Plotting the growth against time gives a typical sigmoid or S-curve.
The exponential growth can be expressed as
W1 = $W_{0^{e^{rt.}}}$
where $W_1$ = final size (weight, height, number etc.)
$W_0$ = initial size at the beginning of the period
r = growth rate
t = time of growth
e = base of natural logarithms
