In what ways could you continue to investigate the behavior of surface water and the creation of watersheds? How would further investigation provide research for strategies to solve the spread of water pollution?
Answer in 2-3 complete sentences.

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

15 ! come and answer! a(n) disease is caused by a pathogen and can spread among organisms. a infectious b noninfectious c toxic d contaminated

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