A positive control is a group in an experiment that receives a treatment with a known result, and therefore should show a particular change during the experiment. It is used to control for unknown variables during the experiment and to give the scientist something to compare with the test group.
Answer:
3.
Explanation:
There is no diversity in asexual reproduction.
Answer:
68.6% s the total of all fossil fuels.
Explanation:
natural gas and coal both are fossil fuel
so add both natural gas and coal percentage.
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Answer:
D) or A) dont know
Explanation:
Because in 2006 it was no longer considered a planet because it did not meet it did not meet the three criteria the IAU uses to define a full-sized planet.
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