The domain system is a system that classifies things into three cellar life forms that are: Archean, Bacteria, and Eukaryota. It has changed due to the different types of things being introduced in the enviroment.
Answer:
you meant what are the main sources
they are: fossil
clean energy
energy storage
hydrogen& fuel
electric power
First of all glucose is the monomer the polymers would be carbohydrates and example of the would be sugar and that provides the energy
the example of DNA the monomers of DNA would be nucleotide the polymer would being nucleic acid and the example would be cytosine
the monomer for protein is amino acids in the polymers is peptide and the example would be membrane
Seismometers and Seismographs