A system of goverment

3 types of systems

Explanation:

- unitary

-federal

-confederate

nucleic acid molecules are incredibly complex, containing the code that guarantees the four different nucleotide units comprise dna, the nucleic acid of interest to the genealogist. and one of four nitrogen-containing molecules called nucleotides

1. efficient use of space

2. elimination of groundwater contamination

3. energy generation

4. lower carbon footprint