Why do you think that the catalase protein has persisted over time in so many organisms?

Catalase is an enzyme which is produced naturally in almost all organisms. This enzyme helps the body to break down hydrogen peroxide (a harmful oxidizing agent) into water and oxygen, it can also prevent the accumulation of CO2 bubbles in the blood. With only one catalase, millions of hydrogen peroxide molecules are converted.
The evolution of organisms always benefits characteristics that are useful to survive and this powerful enzyme represents exactly that.

Catalese protects cells from hydrogen peroxide. It persists because cells need it to survive attacks from this chemical.

Hello we have the same names lol.biology is the study of living beings , that is, all plants and animals including humans.