Intussusception is

Deposition of new materials inside the cell wall of cells starts in

Study the following statements:
$I.$ $O_2$ helps in releasing metabolic energy,which is essential for growth.
$II.$ Nutrients are required by plants for the synthesis of protoplasm.
$III.$ Change in temperature could be detrimental for the survival of an organism.
$IV.$ Light and gravity do not affect the stages of growth.
Choose the correct option.

Constantly dividing cells,both at the root apex and shoot apex,represent:

Where does the maximum growth in the root occur?

The process of growth is determined by