Coal would be your answer. Hope I helped!
They are the basic units of structure because they are the smallest unit of life. you cant go any further. also they make up every living thing from prokaryote to eukaryote.
Answer:
Variation traits and natural selection.
Explanation:
Darwin stated that all species of organisms arise and develop through natural selection and inheritance of variations
In natural selection, survival was for the fittest. In order for an organism to survive . It had to develop new traits to adapt to its environment .
The variation increases its ability to compete, survive and reproduce. Through reproduction the desires trait is passed down making the organism to be considered fit.
Answer:
A: store energy in the form of ATP
