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🌊 Chemistry of Life All living things are made of matter, which is anything that has mass and takes up space. Water is especially important. Water is a polar molecule, meaning it has slightly positive and negative ends. Because of this, water molecules form hydrogen bonds with each other. That’s why water can: hold heat well and support life so effectively 🧬 Molecules of Life All living things are made up of four major macromolecules: carbohydrates lipids proteins nucleic acids Macromolecule