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makvit [3.9K]
3 years ago
12

Explain why, at point X, carbon dioxide is neither taken up nor given out by the tomato plants. (1)

Biology
1 answer:
Anuta_ua [19.1K]3 years ago
3 0

Answer:

This is an controlled experiment because he is only changing the amount of carbon dioxide in the air. Since he is only changing one variable at a time and comparing it to a natural, unaltered tomatoe area, his experiment is controlled.

Explanation:

The definition of a controlled experiment is a test where the person conducting the test only changes one variable at a time in order to isolate the results. An experiment where all subjects involved in the experiment are treated exactly the same except for one deviation is an example of a control experiment.

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