Question

this element was poisonous to the first forms of life on earth until they evolved to tale advantage of it by using cellular respiration. What is it?

Answer 1

Oxygen, it was once harmful and used to cause harm to the DNA In primitive organisms. I’m sorry if it’s wrong but that is what I think it is

Answer 2

Oxygen

Step-by-step explanation

Cellular respiration means taking Oxygen and using it to "breathe" and also be used in many other processes.