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Characteristics of Living Things Anything that is classifed as living (biotic/organic) has or once had all the following characteristics! 1. All living things are made of one or more cells Unicellular vs. Multicellular The cell is the basic unit of structure and function in living things. 2. Living things are organized Structure dictates function Hierarchy/ Levels of Organization in living things Atoms (made of subatomic particles) molecules cells tissues organs organ systems complex organisms 3. All living things grow and develop Growth = increase in mass Development = different abilities 4. All Living Things Reproduce Asexual reproduction Budding- offspring develops as a growth on the body of the parent Binary fission- cell divides into two genetically identical cells Ex. Bacteria Sexual Reproduction External fertilization Internal fertilization 5. All living things respond to stimuli Organisms react to light, temperature, odor, sound, gravity, water, pressure, predators through: Fight response Flight response 6. All living things obtain and use energy Food Water If an organism can’t make it’s own food they must get energy by eating other organisms 7. All living things maintain homeostasis Homeostasis means to maintain balance Examples Body temperature pH Water levels 8. Adaptations evolve over time Adaptation: inherited changes that occur over time that help the species survive Ex. Polar bears What adaptations have they inherited that allow them to survive? Let’s Play a Game!! It’s called: Living, Nonliving, or DEAD Living Potted Plant Baker’s Yeast Glass of Water Fresh Cut Flowers Pumpkin Seeds Cut Hair Cut Fingernails Chicken Sandwich Rubber-band Tree with no leaves during winter Book Rock Nonliving Dead Potted Plant Baker’s Yeast Living X X Glass of Water Fresh Cut Flowers Pumpkin Seeds Nonliving X X X Cut Hair X X X X Cut Fingernails Chicken Sandwich Rubber-band Tree with no leaves during winter X Book Rock Dead X X