Q: What kind of reaction is a reaction in which two or more substances combine to form a single new substance? Choices: - power reaction - compounding reaction - chemical reaction - combination reaction A:
combination reaction
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Q: What is a relationship between living things that depend on the same resources? Choices: - parasitic - symbiotic - contention - competition A:
competition
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Q: Mammals are synapsids, meaning they have a single opening in what structure? Choices: - spine - heart - hip - skull A:
skull
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Q: What serves to replace nonreproducing specialized cells as needed in the adult body? Choices: - osteoclast cells - monocyte cells - dendritic cells - stem cells A:
stem cells
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