Biology, 21.10.2020 23:01 brinjay430
An experiment is done on 90 people to test their vitamin D levels: 30 are given vitamin D tablets, 30 are told to spend 15 minutes in the sun each day and 30 are kept inside and not given any supplements. What is the control group? What is the dependent variable? What is the independent variable?
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Biology, 22.06.2019 14:00
What will happen if two of the base pairs of the stand of the dna are switched
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An experiment is done on 90 people to test their vitamin D levels: 30 are given vitamin D tablets, 3...
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