18. As global emissions of carbon dioxide increase, what's expected to happen in the ocean? O A. Scientists are unsure how the ocean will be impacted by a rise in carbon dioxide emissions.
O B. The pH will increase due to an increase in carbonic acid.
O C. The pH will decrease due to an increase in carbonic acid.
O D. The pH will remain constant due to the carbonate buffer system.

After getting the slide and microscope ready, stella is eager to see the microscopic pond water specimen! she crouches around her microscope and aligns her eye with the microscope’s eyepiece. but she's only able to see a bright white light. at this point, no specimens or cells are visible on stella's pond water slide. after taking a moment to collect her thoughts, stella realizes she can't see any lifeforms because .

Atypical human cell is approximately 12.00 μm in diameter and enclosed by a membrane that is 5.000 nm thick. (a) what is the volume of the cell including the membrane? (b) what is the volume of the cell membrane? (c) what percent of the total volume does its membrane occupy? to simplify the calculations, model the cell as a sphere. enter your answers using four significant figures.

Suppose you could go back in time to interview henri becquerel on the day he discovered radioactivity. from his perspective, write an account of the discovery.