1. Content Domain I: Cells

2. Prokaryotic and Eukaryotic Cells

5. Characteristics of Life
Require food for energy to carry out life processes
Use energy to maintain homeostasis
Respond to stimuli in their environment
Reproduce similar offspring, passing genetic information to them
Made of cells

6. Cells must have boundaries.
Plasma Membrane: Flexible structure that allows cell to change shape, control what enters/leaves, and maintains chemical balance inside the cell.

7. Cell Wall: Thicker, inflexible, gives shape/support to the cell.
Plants, fungi, most bacteria, and a few protists have cell walls.

9. Homeostasis
Organisms maintain their internal equilibrium by responding and adjusting to the environment.
Cells maintain a balance between materials entering and exiting the cell.

10. The plasma membrane helps maintain concentrations of substances inside of cells.
Selective Permeability allows different cells to perform different activities within the same organism.

11. Cellular Transport Passive Transport Diffusion Osmosis
Facilitated Transport

14. Active Transport
Channel Proteins
Endocytosis
Exocytosis

18. Enzymes Enzymes are Catalysts Enzymes speed up chemical reactions
Enzymes are Proteins

19. CRITICAL THINKING
The rate of a reaction depends in part on the concentration of the enzyme and the temperature.

22. 4 Major Biomolecules
Carbohydrates
Lipids
Proteins
Nucleic Acids