Astudent isolates an unknown bacterial sample from the bottom of a swamp area. the student discovers that this species of bacteria is able to live and grow in an oxygen-free environment, but it requires a nitrate-rich soil. which of the following types of respiration is this species of bacteria most likely using?

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

Loss of protected health information collected for research should be directly reported to:

Ecology can best be described as the study of what