Answer: The phosphate group is the negatively-charged polar head, which is hydrophilic. The fatty acid chains are the uncharged, nonpolar tails, which are hydrophobic. Since the heads are hydrophilic, they face outward and are attracted to the intracellular and extracellular fluid.
They can be used to contain cellular waste and to isolate materials that may be harmful to the cell.
Ethical norms also serve the aims or goals of research and apply to people who conduct scientific research or other scholarly or creative activities. ... Third, many of the ethical norms help to ensure that researchers can be held accountable to the public.
