All Middle School Topics » Structure and Properties of Matter / Chemical Reactions / Forces and Interactions / Energy / Waves and Electromagnetic Radiation / Structure and Function of Living Things / Organisms and Ecosystems / Relationships in Ecosystems / Reproduction and Growth of Organisms / Natural Selection and Adaptations / Space Systems / History of Earth / Earth’s Systems / Weather and Climate / Human Impacts
high schoolStructure and Function of Living Things
Structure & Function (LS1.A)
- Systems of specialized cells within organisms help them perform the essential functions of life. (HS-LS1-1)
- All cells contain genetic information in the form of DNA molecules. Genes are regions in the DNA that contain the instructions that code for the formation of proteins, which carry out most of the work of cells. (HS-LS1-1)
- Multicellular organisms have a hierarchical structural organization, in which any one system is made up of numerous parts and is itself a component of the next level. (HS-LS1-2)
- Feedback mechanisms maintain a living system’s internal conditions within certain limits and mediate behaviors, allowing it to remain alive and functional even as external conditions change within some range. Feedback mechanisms can encourage (through positive feedback) or discourage (negative feedback) what is going on inside the living system. (HS-LS1-3)
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