Physical features like a turtle's shell or a cactus's spines.
The specific role an organism plays (e.g., a bee as a pollinator). The Organism
Autotrophs (make their own food via photosynthesis). Physical features like a turtle's shell or a cactus's spines
Single-celled, no nucleus (Prokaryotes). Found everywhere from soil to your gut. The Organism
Convert chemicals and energy into cellular components. Grow and Develop: Increase in size or complexity over time.
Groups of organs working together (e.g., the circulatory system). Organism Level: The complete, integrated living thing. 3. Classification (The Domains of Life)