In this lab, you observed how pollutants affected the of water. You also modeled and observed how pollution affected freshwater sources, including surface water and the water in the
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Researchers randomly divide participants into groups. each group takes a different amount of omega-3 fatty acid supplements daily for a month. one group receives a placebo. the researchers measure the impact on cholesterol levels in the blood. what is the purpose of random assignment in this experiment? a, to produce treatment groups with similar characteristics b, to ensure that all people with high cholesterol have an equal chance of being selected for the study c, to increase the accuracy of the research results and prevent skewness in the data

I’m stuck on this question cuz i’m stupid sksksksk

Which is one example of a phenotypic change that is not genetic