What observations are you talking about
Nicolaus Copernicus, Hope this helps :)
Answer:
Multicellular organisms carry out their life processes through division of labor.
Explanation:
They have specialized cells that do specific jobs. ... Multicellular organisms, depending on their complexity, may be organized from cells to tissues, organs, and organ systems.
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.
The three most common elements are oxygen, carbon, and hydrogen
