2 Complete the table to show the difference between breathed in and breathed out air. Gas
Breathed in
air (%)
21
Breathed out
air (%)
Oxygen
Carbon dioxide
Nitrogen and other gases
0.03
79
79
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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

Moving down the ramp from 6 meters to

Agene editing technology called crispr-cas9 uses cellular machinery to change the cell's genetic material. how might this technology be useful in treating diseases like cancer?