1. CHARACTERISTICS OF LIVING THINGS

2. 1. Made up of Cells Unicellular – made of one cell (ex. Ameba) Multicellular – made of many cells (more than one – ex. Human)

3. 2. Can Reproduce Asexual reproduction – new organism forms from a single parent Sexual reproduction – 2 cells from different parents unite to produce a new organism

4. 3. Based on a Genetic Code Mostly DNA (Double Helix)

5. 4. Grow and Develop Metamorphosis

6. 5. Obtain and use Materials and Energy Food & Oxygen Metabolism – chemical reactions through which an organism builds up or breaks down materials as it carries out its life processes

7. 6. Respond to their Environment Fight or Flight Stimulus – signal to which an organism responds Stimulus is produced as a function of the nervous system An organism reacts to stimuli following a pathway (neuron) through the nervous system to produce a response

8. 7. Maintaining Internal Balance Homeostasis – process by which organisms maintain a relatively stable internal environment (ex. Body temperature – hot/cold)

9. 8. Evolution Taken as a group, living things change over time

10. CHARACTERISTICS OF LIVING THINGS 1. Made up of Cells 2. Can Reproduce 3. Based on a Genetic Code 4. Grow and Develop 5.Obtain and use Materials and Energy 6. Respond to their Environment 7. Maintaining Internal Balance 8. Evolution

11. Examples – Alive, Dead or Nonliving Bacteria  Alive Water  Nonliving Wooden Door  Dead Fire  Nonliving

12. RELATING HUMAN SYSTEMS TO CHARACTERISTICS OF LIFE

13. Characteristics vs. Human of life Systems Obtain Materials Transport Use Materials and energy Reproduce Digestive & Respiratory Circulatory Muscular, Digestive, Respiratory & Circulatory Reproductive & Endocrine

14. Characteristics vs. Human of life Systems Grow and develop Maintain a stable environment (Homeostasis) Skeletal, Muscular & Integumentary Nervous, Endocrine, Circulatory, Respiratory, Digestive, Excretory, Integumentary, Immune & Lymphatic

15. Characteristics vs. Human of life Systems Respond to stimuli Change over time Possess genetic material based on a universal code Nervous Reproductive