Question

use the passage and graph to answer the following questions. two biology students, noah and mateo, conducted an experiment testing the effects of intense light vs darkness on the amount of dissolved oxygen in an aquatic ecosystem. they placed two aquatic plants (java moss) in a tank filled with freshwater. they exposed the tank to each condition for 6 hours, measuring the dissolved oxygen levels using a sensor. before each experiment, they allowed the tank to sit undisturbed in normal conditions for 6 hours. a graph of their data is shown below. unfortunately, the students forgot to label their data files, so they dont know which plant was exposed to which condition. what should mateo and noah do next to improve their investigation? change the intensity of the light. conduct the same experiment several more times. have another group follow their procedures with different plants. change the length of time the plants are exposed to light or darkness.

Explanation:

Repeating an experiment multiple times helps to increase the reliability of the results by reducing the impact of random errors. Changing light - intensity or time exposure would modify the experiment rather than improve its reliability, and having another group with different plants may introduce new variables.

Answer:

Conduct the same experiment several more times.