approximately what percentage of the body's energy needs at rest is supplied by fat

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

Which of the following is a way that minerals are used? a. industry construction technology d. all of the above

Which of the follow describes a disadvantage secondary sources have compared to primary sources?