Answer:The most characteristic feature of plant cells is their rigid cell wall. Human cells only have a cell membrane. The cell wall is primarily made of cellulose, which is composed of glucose monomers. ... Furthermore, the cell wall also prevents dangerous pathogens from entering the cell.
Explanation:
I believe it is inappropriate to require pre-marriage genetic testing. Just because people are getting married doesn’t mean they’re going to have children. They honestly shouldn’t require genetic testing at all unless the state is paying for it.
I believe it is the ascending loop of henle. In the ascending portion, the loop becomes impermeable to water and instead the cells of the loop, actively reabsorb the solute; thus water is not reabsorbed but ions are readily reabsorbed. As the ions are reabsorbed the concentration becomes more and more hypotonic until it reaches 100-150 mOsm/L. Therefore, the ascending loop is called the diluting segment of the nephron due to its ability to dilute the fluid in the loop from 1200 to 100 mOsm/L.
D is the answer. The level of matter cannot be shifted, it can only stay constant even during chemical reactions.
