It is easy to see that the drop seems to have a "skin" holding it into a sort of flattened sphere (although there is nothing flat about a water drop in outer space.). It turns out that this surface tension is the result of the tendency of water molecules to attract one another. The natural form of a water drop occurs in the "lowest energy state", the state where the atoms in the molecule are using the least amount of energy. For water, this state happens when a water molecule is surrounded on all sides by other water molecules, which creates a sphere or ball (perfectly round if it was in outer space). On Earth, the effect of gravity flattens this ideal sphere into the drop shape we see. Although you may have heard of a "skin" where water meets the air, this is not really an accurate description, as there is nothing other than water in the drop.
1. A cell cannot be subdivided into smaller units that maintain the living state.
2. The organism is a eukaryote, because it has a cell membrane, a cytoplasm, and DNA.
3. nucleus, chromatin
4. The fluid in their cells is hypertonic with respect to the external environment and so they have to be able to pump water out.
5. provides electrons
6. none
7. ATP and NADPH
8. glycolysis, pyruvate oxidation, Krebs cycle, electron transport
9. Eighteen times more ATP is formed during aerobic respiration than during anaerobic respiration.
10. Glucose
I believe that the answer is the shore line. A shore or a shoreline is the fringe of land at the edge of a large water body of water, such as an ocean, sea, or lake. In physical oceanography it is the wider fringe that is geologically modified by the action of the body of water past and present, while the beach is at the edge of the shore.
In vascular system of plant do the tissues xylem and phloem work