Question

Malik formed a hypothesis that an increase in atmospheric oxygen levels by 10% would cause red-legged grasshoppers to grow larger than normal. Suppose that Malik performs an experiment to test his hypothesis. Which of these actions would represent a scientific mistake in his experiment? A. He experiments on live grasshoppers instead of preserved ones. B. He focuses on red-legged grasshoppers instead of all kinds of grasshoppers. C. He varies the nitrogen and carbon dioxide levels in the air from one trial to the next. D. He conducts the experiment in a controlled lab setting with a lab partner. E. He measures the mass and length of his specimens at the start of each trial.

Answer 1

Answer: The correct answer is C. He varies the nitrogen and carbon dioxide levels in the air from one trial to the next.

Explanation: I just took the test and this is correct

Answer 2

Statement C, that is, he varies the nitrogen and carbon dioxide levels in the air from one trial to the next would represent a scientific mistake in his experiment.

The hypothesis of Malik was regarding the influence of increased oxygen level on the growth of the red-legged grasshoppers. Thus, the areas of his experiment should be the type of grasshopper, the rate of growth of grasshopper, and a high level of oxygen. Therefore, all the given options are relevant to his experiment, except option C.