You need to test the hypothesis several times and record all results. Once you obtain the same results several times, I think that means its a theory
Eukarya is the domain containing all organisms with eukaryotic cells.
I am pretty sure it is something related to space
Lamprey and hagfish are jawless fish, with skeletons composed of cartilage. They do not have scales and are considered primitive fish. They are in the superclass cyclosystoma.
