Plant Growth and Development Question 1
1. Typical growth curve in plants is : [2015 RS]
(a) Linear
(b) Stair-steps shaped
(c) Parabolic
(d) Sigmoid
Show Answer
Answer : d
Hints & Solutions
(d) Sigmoid growth curve maintains equilibrium with carrying capacity, it forms asymptote stage in plants. The rate of growth of a plant or plant part is not always the same during its life span. If we plot the increase in cell number (growth rate) against time, a typical $S$-shaped curve is obtained. This is called growth curve or sigmoid growth curve.
