Question

In arithmetic growth, following mitotic cell division, only one daughter cell continues to divide while the other differentiates and matures. The simplest expression of arithmetic growth is exemplified by a root elongating at a constant rate. On plotting the length of the organ against time, a linear curve is obtained, as seen in the graph. Mathematically, it is expressed as -

• A. $L_t=L_0+rt(L_t$ = Length at time't' $L_0$ = length at time 'zero’ $r$ = growth rate/ elongation per unit time.
• B. $L_t=L_0{e}^{rt}$
• C. $L_t=L_0+rt$ or $L_t=L_0{e}^{rt}$
• D. $L_t=2\times L_0$

Answer 1

Answer: (A)

Correct answer is (a) $L_t=L_0+rt(L_t$ = Length at time't' $L_0$ = length at time 'zero’ $r$ = growth rate/ elongation per unit time.