ATP (adenosine triphosphate)
Atoms. Every element is made of a specific type of atoms.
Dust in the air because the water molecules need something to condense around.
The two properties that a human and a spider would exhibit is that both of them are composed of eukaryotic cells and the exhibit sexual reproduction. Eukaryotic cells are cells with membrane bound organelles such as the nucleus which contains the genetic material enclosed by a nuclear membrane. Sexual reproduction is a type of reproduction where livings give rise to new off springs by combining genetic material from two individuals of different sexes.
