The cell cycle requires energy. Which process supplies this energy so that the cell cycle can take place in all living things

Cellular respiration

Explanation:

All living cells strictly require energy in form of ATP to perform their cellular functions. This energy is obtained when food molecules are broken down on their cells in order to release the stored energy in their bonds. This anabolic process is called CELLULAR RESPIRATION.

CELL CYCLE is one of the cellular functions performed by a cell, as every cell needs to undergo division. According to this question, the cell cycle requires energy, which is also supplied via the process of CELLULAR RESPIRATION.

b.have there own function.

igneous rocks which formed by the crystallization of magma at the surface of the earth called extrusive rocks. they are characterized by fine-grained textures because the rapid cooling at or near the surface did not provide enough time for large crystals to grow.