C. Observation because you observe the information
Answer:
starting substances of a chemical reaction are called the reactants, and the new substances that result are called the products.
Explanation:
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1. Interphase: Chromosomes duplicate
2. Prophase: Chromosomes pair up
3. Metaphase: Chromosomes line up at equator
4. Anaphase: Chromatid sisters pulled apart
5. Telophase: Cells begin to divide
6. Cytokinesis: Two daughter cells are formed
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