Convert chemicals and energy into cellular components. Grow and Develop: Increase in size or complexity over time.
Autotrophs (make their own food via photosynthesis).
The basic unit. Unicellular organisms (like yeast) are just one cell. Multicellular organisms (like humans) have trillions. The Organism
Create new individual organisms (sexually or asexually).
Groups of organs working together (e.g., the circulatory system). Organism Level: The complete, integrated living thing. 3. Classification (The Domains of Life) Convert chemicals and energy into cellular components
Different tissues working for a specific function (e.g., the heart).
Internal processes like a snake producing venom or a human sweating to cool down. 5. The Organism and the Environment The Organism
React to external changes in its environment. 2. The Hierarchy of Structure Organisms are organized in a "ladder" of complexity.