The answer you are looking for is A) erythrose.
Answer and Explanation:
Image result for How did the results prove the semiconservative model of DNA
The experiment done by Meselson and Stahl demonstrated that DNA replicated semi-conservatively, meaning that each strand in a DNA molecule serves as a template for synthesis of a new, complementary strand. Although Meselson and Stahl did their experiments in the bacterium E.
Answer:
B, Transport water and nutrients upwards
Explanation:
Marine fish gills have cells that have the ability to can remove salt by pumping it into the salt water.
This is active transport in real life.
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