Shape is a chemical property.
True
False

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

Adigestive system that is a series of tubes beginning at the mouth and ending at the anus is a digestive system.

Aflame cell is at the end of each tubule of the nephridium malpighian tubules kidneys none of the above