Cause living things can not directly use most of matter which they found in nature. For example carbon, all organism use carbon in complex structure, that is in compound or macromolecule(glucose,fructose,amino acid). we can not directly earn ATP from C which we found in soil/other sources.
Answer:
Gasoline fuel is used for running automobiles.
They are called Eukaryotic cells or Eukaryotes
The effects could be, the top consumers may run out of food, which would make it harder for them to catch food
