I think it is the cell membrane, but there is a possibility it is the cell wall. I think the cell membrane is correct because the skin does allow certain things into your skin cells, such as water. Similarly, cell membranes allow certain things in the cell. The cell membrane basically acts as the security guard of the cell.
<span>Women are likely to be made jealous by physically attractive rivals. Women are often jealous when they are attracted to a counterpart that they also have a dispute with. Jealousy is a common feeling within all of us and it is hard to shake that feeling without getting over our inner 'issues' ourselves. </span>
<span>When a scientist needs to <u>observe </u>they make observations. Observing is a fundamental part of scientific investigation. Observations of natural phenomenon lead scientists to ask questions, research and form a hypothesis. When the scientist sets up experiments to teat out their hypothesis again the scientists must use their observation skills to monitor their test and make sure there are no mistakes.</span>
A. makes federal law the highest in the land
