Answer:
Iron is a major component of red blood cells. The oxygen you breathe bonds to the iron in your red blood cells. If you had no iron in your body you would likely die.
Adaptation is the tendency of some members of a population to be better able to survive and reproduce and pass on their characteristics.
B and E, since not everyone believes in supernatural beings or the affects of astrological signs
Both prokaryotic and eukaryotic cells have a nucleus and ribosomes.
