Question

Accretionary growth is due to
A. Reserve cell
B. Meristematic cells
C. Embryonic cells
D. Differentiated cells.

Answer 1

The process which involves an increase of the size of any organism gradually into a complex stage from the simpler form that leads to a completely developed state is known as growth. It is a natural process that transforms an organism from its initial state to a mature state. Example: a baby growing from birth to its adult stage.

Complete answer:
Reserve cells are permanent cells that involve structural formation and other functions but do not take place in cell reformation. In some exceptional locations of the body reserve cell involved in the renewal of old cells into new cells. This is called accretionary growth. Accretionary growth refers to the development that occurs in the adult stage of an organism. This growth is only occurring in the permanent cells of the body. During the postembryonic stage, accretionary growth happens.
Meristematic cells: The cells which are capable of developing multiple times and are responsible for the formation of the new structure of an organism are called Meristematic cells.
Embryonic cells: The cells which are found in the embryo and involve in the formation of different structures and organs of the embryo are known as embryonic cells.
Differentiated cells: differentiated cells are responsible for forming the new structure by differentiation and become permanent. After maturation, differentiated cells perform cell division again for the further growth of the organism.
So, the correct answer is “Option A”.

Note: In bones and cartilage, accretionary growth is found. Accretionary growth only occurs specifically in the need of the body. When bones and cartilages cells become injured for some reason, it performs the accretionary growth. This type of growth of the extracellular matrix is found.