10. When did whale ancestors begin living full time in the water? a. After they nursed under water b. After they lost their hind legs C. Before they evolved gills d. Before they began eating a carnivorous diet​

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

This is so important ugh its 25 points

Witch theory suggests all living things are made up of cell or cells