Less than 4% of the world's water is fresh water and 2/3 of it is underground
Answer: I think scientist prefers to use SI because it’s much easier and you can covert between units.
Explanation:
Its is easier for scientists to communicate with one another if they all use the same units. In addition, it is very easy to convert between different SI units
Exothermic reactions occur outside of the object, while endothermic occur on the inside.
Answer:
The correct answers are-
a. Its metabolic demands increase.
b. It's surface area-to-volume ratio decreases.
c. Its ability to transport enough nutrients in and transport wastes out to meet cellular metabolic demands decreases.
Explanation:
As the size of a cell increases the surface area to volume ratio decrease. So a big cell has less surface area and small volume. Therefore surface area for transfer of metabolic substance per unit volume decreases so the cell's ability to transport enough nutrients in and transport wastes out to meet cellular metabolic demands also decreases.
But due to an increase in the volume of the cell the metabolic demand of cell increases because a larger cell requires more nutrients than a smaller cell to survive which can not be fulfilled efficiently due to less surface-area-to-volume ratio.
Therefore the correct answer is a, b, and c.