1.1 - 1.2 class notes.JPG

# Biology Notes **2 1.1-1.2 CLASS NOTES 8-15-24** **COMMON THEMES** 1. Evolution 2. Energy always flows through systems 3. Information is stored and passed on through genetics 4. Systems interact **CHARACTERISTICS OF LIFE** * **Unicellular vs. Multicellular** * Bacteria - plural is colony...

# Biology Notes **2 1.1-1.2 CLASS NOTES 8-15-24** **COMMON THEMES** 1. Evolution 2. Energy always flows through systems 3. Information is stored and passed on through genetics 4. Systems interact **CHARACTERISTICS OF LIFE** * **Unicellular vs. Multicellular** * Bacteria - plural is colony * Paramecium - pond water * Movel/mushroom - Sunflower * Goose * **Emergent Properties** * Atoms -> molecules -> macromolecules -> organelles -> cells -> tissues -> organs/organ systems -> complex organisms * Additional Levels of organization * Atoms- molecules- Tissues- cells- organ systems - Organisms - Populations - Communities - Ecosystems - Biosphere **Definition of Life** 1. Must have at least one cell. 2. Must have a metabolism. 3. Must be able to reproduce as a species. 4. Must be able to grow and develop. 5. Must evolve by adaptation 6. Must maintain homeostasis 7. Must respond via irritability and instinct **CHARLES DARWIN** * Wrote *On the Origin of Species*. * Natural Selection: Nature selects traits that are beneficial. **METABOLISM** ``` Sun / \ / \ Producers -> Consumers \ / \ / Decomposers/Glucose/chemicals Heat ``` **Producers - Autotrophs (self-feeder)** **Consumers - Heterotrophs (other-feeder)** **Prokaryotes** - no nucleus **Eukaryotes** - true nucleus