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Some macromolecules are multiples of a repeating unit (monomer), they are called polymers. Carbohydrates, proteins, and lipids contain monomers. But, some macromolecules cannot be sub-divided into individual entities; some of those molecules have macrocycles. For example, fat is a macromolecule...
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Front the atmosphere that's from environment
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To convert Metamorphic into sedimentary rocks is high heat and pressure.
The predator consumes the prey