"How many bubbles would both plants produce at the following depths: - 13 meters, 20 meters, 28 meters"

39, 45

27, 42

6, 7

Explanation:

In 13 meters depth, there are 39 bubbles produced per plant in one minute and 45 bubbles are formed per plant in one minute. In the depth of 20 meters, there are 27 bubbles produced per plant in one minute and 42 bubbles are formed per plant in one minute. In 28 meters depth, there are 6 bubbles produced per plant in one minute and 7 bubbles are formed per plant in one minute.

b. the carbon cycle ensures living things have a source of hydrogen