Nanotechnology . allows microscopic particles to inject medicine directly into cancer cells
allows doctors to take high quality digital pictures inside the body
focuses on the use of robots to perform surgical procedures
will eliminate the need for doctors

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

Knowing the importance of the essential elements, why would someone chose a diet that does not address all of them?

The earth's oceans are made up of chlorine, and trace elements. a) carbon, oxygen b) oxygen, silicon c) hydrogen, oxygen d) nitrogen, oxygen