In a vascular plant,the exponential phase represents the phase of

After four successive mitotic divisions of a cell,in an arithmetic growth pattern,the total number of cells that have lost the ability of cell division is . . . . . . .

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.

In $......$,growth occurs throughout life,whereas in $......$,growth is observed only up to a certain age.

Define the following terms:
$(1)$ Growth
$(2)$ Growth rate

Choose the correct statement.