I believe that b: shelters had to be built, does not describe the hardships of farming on the great plains.
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Answer: By nourishing our bodies with good food and living to the fullest.
Explanation:
Answer:
Neurotransmitters and hormones are similar because they are both picked up by receptors and they are both chemicals. A difference is that neurotransmitters are still using an electric charge to be sent and hormones are triggered chemically. Another difference is that they interpret target cells in a different way.