The leaves of $Mimosa$ $pudica$ (Sensitive Plant) droop down on touch because

Exponential growth can be expressed as

Identify the correct and incorrect statements from the following.
$(i)$ $17,500$ new cells are produced per hour by a single maize root apical meristem.
$(ii)$ With the help of length,growth of pollen tube is measured.
$(iii)$ The growth of the leaf is measured in terms of volume.
$(iv)$ Cells in a watermelon may increase in size by up to $3,50,000$ times.

What does $r$ represent in the equation $W_1 = W_0 e^{rt}$?

The efficiency index of growth in plants represents . . . . . . .

What are the different phases of growth?