The normally treated group is called the control. Scientists use control to lessen the effects of variables. The accuracy of the results becomes higher. Control groups can be positive or negative depending on the expectation of a phenomenon that would occur in it.
Answer:
Despite the availability of cleaner energy sources, most of the energy used to power American homes comes from the
burning of fossil fuels such as coal and oil. The burning of fossil fuels releases carbon dioxide into the air. Carbon dioxide
is a greenhouse gas that contributes to climate change.
Why do you think it's a challenge to reduce fossil fuel usage in homes in the United States? How could the use of fossil
fuels affect the biodiversity in neighborhoods and the surrounding ecosystems?
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Part B: Conduct Background Research
Research is the first step in engin
The population would decrease because the high death rate and low other rates would lead to more deaths than births, and not many other people would be entering the country/place, so the population would decrease
Answer it’s the left ventricle
The papillary muscle is in the left ventricle if the arrow is looking for more specific
Reason
See attached picture
