Growth is maximum in the zone of

The growth period of a plant is generally divided into how many phases?

Find out the correct statement$(s)$.
$(a)$ Growth in plants is internal/intrinsic and open-ended.
$(b)$ Formation of cellular materials is called real or protoplasmic growth.
$(c)$ Plant growth is diffused only during the early embryonic stage.

Which one of the following occurs maximum during the exponential growth phase in plants?

Identify the types of growth shown in the given figure.

$A$ single cell in the root apical meristem of maize can give rise to more than $......$ new cells per hour.