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12 Cards in this Set
- Front
- Back
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What is a cell?
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basic unit of structure and function of all living things
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Unicellular
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a single-celled oganism
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Multicellular
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composed of more than one cell
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What characteristics do all living things share?
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cellular organization, use energy, grow and develop, respond to their environment, reproduce
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stimulus
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change in an organism's surroundings that causes the organism to react
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response
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any reaction to a stimulus
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spontaneous generation
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false idea that living things arise from nonliving things
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main chemicals found in cells
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proteins, nucleic acids, carbohydrates, lipids and water
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What are the 4 basic needs living things
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energy, water, living space, and stable internal conditions
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autotroph
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organism that produces its own food
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heterotroph
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organism that cannot make its own food
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homeostasis
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process of maintaining a stable internal environment
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