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| 1. |
What were the responsibilities or characteristics of each level in the hierarchy? |
| Answer» ACETYLCHOLINE is an organic chemical that function in the brain and BODY of many TYPES of animals as a neurotransmitter a chemical message released by nerve CELLS to send signals to other cells, such as neurons, muscle cells and gland cell.Explanation:MARK ME AS BRRAINLEST PLEASEEEEE | |