Researchers must utilize a control group in a scientific study because <span>it is important to show that between two groups that were similar from the beginning of the study, the one that received the manipulation is the one that changes. Note that the control group is the group in the experiment that does not receive manipulation by the experimenter and is thus used as basis for how the other test subjects changed. </span>
Answer:
march for jobs and freedom which means free from racism that happened back in the 1960s
Explanation: i hope this sort of help but if this does not help than i am sorry
Answer:
I think it is grasses and animals
Explanation:
Anthropologists have assumed that people came to the Americas because they were following food on the hoof.
Answer:
With the Occupational Safety and Health Act of 1970, Congress created the Occupational Safety and Health Administration (OSHA) to ensure safe and healthful working conditions for workers by setting and enforcing standards and by providing training, outreach, education and assistance
Explanation:
During Angolan civil war, there are 2 groups who fight for the power in Angola : MPLA and UNITA
The civil war turned into cold war battle ground because the MPLA was supported by Uni Soviet and the UNITA was supported by United States
