The vacuole i believe is the answer
The food web includes herbivores - (animals that eat plants), carnivores - (animals that eat other animals), and <span>Omnivore<span> - (an animal that eats both plants and animals)</span></span>
Our hands have oils that will change the polarities of the substances when doing the chromatography. Since the purpose<span> of chromatography is to separate the compounds in a mixture we would end up with altered results.</span> The same goes for getting the paper wet.
