Assumingely, they sound like they are both archaebacteria. Which are found everywhere, some even on your body.
Because cellulose is a complex polysaccharide which is essential in dietary functions. Since we don't have the enzymes that digest cellulose, it passes through our gut unchanged hence form an important roughage which aids in preventing constipation as well as smooth movements of our intestines.
Fatty acid tails = hydrophobic
Phosphate heads= hydrophilic
Backward chaining starts with a goal then searches back. Forward chaining starts with facts and searches forward.
