1.  Exploring Life Miss Napolitano & Mrs. Haas, CP Biology

2. Life!  Biotic: living  Abiotic: nonliving

3. Characteristics of All Living Things 1. Made up of cells 2. Reproduce 3. Genetic code (ex: DNA) 4. Growth & development 5. Obtaining & using materials 6. Response to stimuli 7. Homeostasis 8. Evolve

4. Made Up of Cells  Basic structural unit of biology  Can be unicellular or multicellular  Unicellular: made of 1 cell  Multicellular: made of 2+ cells

5. Reproduction  The ability to produce offspring  Can be asexual or sexual  Asexual: 1 parent, makes exact clones  Ex: binary fission, budding  Sexual: 2 parents, makes genetically different offspring  Ex: conjugation, fertilization  Leads to genetic variation

6. Genetic Code  Contain material that can be passed form parent to offspring  Ex: DNA

7. Growth & Development  Grow: increase in size  Develop: changes over the course of it’s life  Multicellular develop more because more complex!

8. Obtaining & Using Material  Metabolism: totality of all chemical reactions within the organism to build or breakdown materials

9. Response to Environment  Organisms can detect changes (stimuli) in the environment & respond  Ex: Venus fly trap, pupil to light

10. Homeostasis  Homeostasis: constant internal conditions  Negative feedback: end product opposes/inhibits initial stimulus  Ex: Body temperature, blood sugar  Most common  Positive feedback: end product amplifies initial stimulus  Ex: Labor contractions, platelet response

11. Evolution  Evolution: species change over time (not individual change!!)  Adaptations: change that increases the chances of survival of an organism and its environment  Stay tuned!