It compares the number of mutations that exist in the DNA of two different species.
Ralph is being very compatible with the littluns unlike Jack who is being rough with them.
Well a hypothesis is guess about an experiment and how it works or is preformed. If your supporting one then you agree with how its done and how it works and you got good results. If you fail a hypothesis that means you most likely tried and didn't succeed or didn't get the results you wanted. Sorry if this is confusing the question kinda confused me.
Animals with bilateral symmetry have a distinct head end
