The correct answer is B) decreases; more difficult.
Unicellular organisms such as <em>Amoeba</em>, <em>Paramecium</em> depend on diffusion to move substances into and out of the cell. The surface area of unicellular organisms is large compared to its volume. Therefore, nutrients and other substances can easily cross the membrane and around their body.
As a cell's volume grows, its surface area/volume ratio <u>decreases</u>, making it <u>more difficult</u><u> </u>to acquire enough nutrients via diffusion.
Because the rib muscles and diaphragm contract,increasing the lung volume
C. were conditioned to salivate in response to the sound of a bell.
I would say the skin and eyes but thats a guess
Answer:
their molecule movement decrease s
Explanation:
molecules move more slowly, reducing the frequency of enzyme-substrate collisions and therefore decreasing enzyme activity