Answer:
The hemoglobin in an individual of Denver which lives higher altitude than the Philadelphia will be higher due to the higher elevation atmospheric pressure decreases that causes hemoglobin to nind to the RBCs and that will lowers the oxygen level in the body of the person. To overcome this drawback hemoglobin content is higher in people living at higher elevation.
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The control group is the group that gets no specal treatment.
If your askiing if that statment is true it is.
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Answer:
Bacteria converts ammonia into nitrate and nitrite, they produce chemicals that the plants eat to prevent the bacteria from dying.
Explanation:
I hope this helped, even though it might not- oh, sorry for being so awkward, haha.
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The answer is most likely testing. scientists test their data againt their hyputhesis.
