Which type of growth is shown in the given figure?

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

In the following diagrammatic representation showing stages of embryonic development,identify the type of growth phase labelled as $M$ and $N$.

It provides the medium for enzymatic activities needed for growth.

In the lag phase,growth is:

Explain the factors affecting growth.