How does growth take place in an organism?

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(D) Growth in an organism is primarily defined as an irreversible increase in size,mass,or number of cells. While chemical reactions and the conversio

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By multiplication of cells or tissues

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(D) Growth in an organism is primarily defined as an irreversible increase in size,mass,or number of cells. While chemical reactions and the conversion of nutrients are essential metabolic processes that support growth,the fundamental mechanism by which an organism increases its physical dimensions and complexity is through the multiplication of cells (cell division) and the subsequent increase in the size of these cells or tissues.

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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