Cells may become dehydrated when water leaves the cell and enters the surrounding environment, leaving the cell limp and shriveled. When this happens, what type of solution is the cell in, and how would taking in water help the cell?

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

How can scientists test their ideas about the origin of the universe if they can't physically interact with or study?

The concept of keystone species is controversial among ecologists because most organisms are highly interdependent. if each of the trophic levels is dependant on all others how can we say one is most important