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The Essence of Life
- Every living thing on Earth is made of cells, which consist of atoms, molecules, and chemical reactions.
- The fundamental question arises: What makes these components alive?
Cellular Complexity
- Modern cells are incredibly complex, with intertwined systems that are difficult to replicate.
- Origin-of-life researchers believe the first cells were much simpler.
Properties of Life
- Researchers agree a basic life form needs three properties: structure, metabolism, and reproduction.
- A life form needs to hold itself together, take in energy, and copy itself.