Nonmetal atom
Nonmetal atom
Nonmetal atom
The structural units are the heart,blood, and blood vessels
atoms
Nonmetal atom
Nonmetal atom
ions
Nonmetal atom
Amino acids are the basic structural building units of proteins.
They make up structural parts of cell membranes
They make up structural parts of cell membranes
Nucleotides are molecules that, when joined together, make up the structural units of RNA and DNA.