Structural Organization Atoms Simple molecules Macromolecule s Membranes Organelles Cells Tissues Organs Organ Systems Animal Small Large

How do we classify something as living? Living things… 1. Have a need for energy (from chemicals, sunlight, other animals, etc.) 2. Respond to their environment (to survive) 3. Have the ability to reproduce= pass genetic info (asexual or sexual) 4. Are made up of one or more cells

Cell Theory 3 basic components: 1. All organisms are made of cell(s). 2. All existing cells are produced by other living cells. 3. The cell is the most basic unit of life.

2 Types of Cells 1. Prokaryotes= No nucleus (“before” nucleus) ◦ Example = Bacteria

2. Eukaryotes= Nucleus (“true” nucleus) All other Kingdoms: ◦ Fungi ◦ Plants ◦ Protists ◦ *Animals Eukaryotic cells have many organelles- Structures that perform specific functions. *plasma membrane, cytoplasm, nucleus

Cell Locomotion Cilia = “eyelashes” Flagella = “small whips” *Locomotion needed to find a food source or escape predators/harsh conditions.