The type of cartilage growth in which stem cells at the internal edge of the perichondrium divide, differentiate into chondrocytes, and create new cartilage at the periphery is called growth.

Appositional Growth is the type of cartilage growth in which 1. stem cells at the internal edge of the perichondrium divide, differentiate into chondrocytes, and create new cartilage periphery.

To add, the process of appositional growth occurs when the cartilage model also grows in thickness due to the addition of more extracellular matrix on the peripheral cartilage surface. The following are the next steps in appositional growth.

2. The committed cells differentiate into chondroblasts. 
3. These chondroblasts, located at the periphery of the old cartilage, begin to produce and secrete new cartilage matrix. As a result, they push apart and become chrondrocytes, each occupying its own lacuna. 
4. The new matrix has been produced peripherally, and thus appositional growth has occurred.

answer; atp and nadph;

hey bro i looked it up on google the structure of the eye-spot in euglena viridie, e. ehrenbergii, and phacus pyriyorme is not as franzé haa described it. the so-called “crystal body” and “lens bodies” were not found in any of the individuals of the species examined by me. as earlier observers have stated, the eye-spot consists simply of a mass of pigment granules arranged in a single layer, and probably embedded in a protoplasmic framework, but the latter could not be seen, and its presence was only inferred from the fact that the pigment granules must be held together in some way, thd the eye-spot as a whole is capable of expansion, and that the pigment granules can be separated from each other.

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