The answer i think is gene and i can garantee
it is correct
Answer:
The fourth plant that receives pure water is the control group.
Explanation:
The election of a control group is essential in an experiment. Its principal purpose is to allow the discrimination of the results obtained by the treatment in the study, in this case, <em>the different concentrations of salty water that each plant receives</em>. The control group provides a reference point. It must be selected from the same population of the treatment groups. Both groups must be similar in every variable that might influence the results, <u>except for the study treatment.</u>
Since we can't see your choices we can only do so much to help you unfortunately. However, the word abiotic means non living. So if it's saying which is NOT an example of an abiotic factor, then your answer would be the choice that has to do with living. For example, plants, animals, etc.
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