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What makes something alive?What makes something alive?

Living things share a set of traits that help us tell them apart from nonliving things:Living things share a set of traits that help us tell them apart from nonliving things:

• Every living thing is made of one or more cells, the basic units of life.Every living thing is made of one or more cells, the basic units of life.
• Organisms take in and use energy to grow, repair themselves, and carry out life processes.Organisms take in and use energy to grow, repair themselves, and carry out life processes.
• They respond to changes around them, such as light, temperature, or available food.They respond to changes around them, such as light, temperature, or available food.
• Living things grow and can reproduce, passing information to the next generation.Living things grow and can reproduce, passing information to the next generation.

No single trait tells the whole story. Look for several characteristics working together.No single trait tells the whole story. Look for several characteristics working together.