The plasma membrane is which means it permits the passage of only certain molecules into and out of the cell, and blocks the passage of some substance altogether

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

Why is it important that fibrin is insoluble in water?

Vessels draining the myocardium of the heart, open primarily ,into which chamber?