The maximum growth rate occurs in

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(B) The growth curve of a plant or population typically follows a sigmoid pattern.$1$. The $Lag$ phase is the initial period where growth is slow as t

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Exponential phase

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(B) The growth curve of a plant or population typically follows a sigmoid pattern.$1$. The $Lag$ phase is the initial period where growth is slow as the organism adapts to the environment.$2$. The $Exponential$ phase (or $Log$ phase) is characterized by rapid cell division and expansion,leading to the maximum growth rate.$3$. The $Stationary$ phase occurs when growth slows down due to limited resources.$4$. The $Senescent$ phase is the final stage where growth declines and the organism ages.Therefore,the maximum growth rate is observed during the $Exponential$ phase.

Column-$I$ (Structure for growth)	Column-$II$ (Parameter)
$P$. Maize root apical cell	$I$. Length
$Q$. Watermelon cell	$II$. Number
$R$. Pollen tube	$III$. Size
$S$. Dorsiventral leaf surface	$IV$. Surface area

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Match the following columns regarding the parameters of growth:
Column-$I$ (Structure for growth) Column-$II$ (Parameter)
$P$. Maize root apical cell $I$. Length
$Q$. Watermelon cell $II$. Number
$R$. Pollen tube $III$. Size
$S$. Dorsiventral leaf surface $IV$. Surface area

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