Answer:
A mutation is a change that occurs in our DNA sequence, either due to mistakes when the DNA is copied or as the result of environmental factors such as UV light and cigarette smoke. Mutations can occur during DNA replication if errors are made and not corrected in time.
Organisms are made up of a bunch of cells. Billions of cells coming together make up an organism.
They help convert nitrogen to nitrate which is usable by living beings. (Living beings can't use regular nitrogen)
Continental plate moving on the sea floor.
