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PART - 2 - Unit IV : CH - 13 Plant Growth and Development — BIOLOGY STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceBIOLOGYPART - 2 - Unit IV : CH - 13 Plant Growth and Development3 Marks
Question
Describe briefly :
Arithmetic growth
✓

Answer

Arithmetical growth: 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.
Image
On plotting the length of the organ against time, a linear curve is obtained. Mathematically. it is expressed as
where, $L _{ T }= L _0+ rt$
$\quad$$\quad$ $\begin{array}{l}L_t=\text { length at time } t \\ L_0=\text { length at time zero } \\ r=\text { growth rate elongation per unit time } \\ t=\text { time of growth }\end{array}$

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