d. the living world. Biologists need to use the living world in order to back up the scientific method.
Answer:
The correct answer is oxygen.
Explanation:
Hope this helped Mark BRAINLEST!!
<span>Definition of Compound. ... The type of bonds holding elements together in a compound can vary: two common types are covalent bonds and ionic bonds. The elements in any compound are always present in fixed ratios. Example 1: Pure water is a compound made from two elements - hydrogen and oxygen.</span>
Answer:
DNA that contains genes from more than one organism is called "Recombinant DNA".
