8 Characteristics

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8 Characteristics Of Living Things
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All living things are
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Made up of cells

• Basic unit of structure and function of all
  living things
• Unicellular composed of one cell
• Bacteria, Amoeba, Yeast
• Multicellular composed of two or more cells
• Plants, Animals
• Cells form tissues
• Tissues form organs

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All living things
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Contain a genetic code

• DNA- Deoxyribonucleic acid
• Universal code for life
• A,G,C,T aka nitrogen bases
• of bases vary
• Letters combine to form genes

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All living things
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Reproduce

• Essential for the survival for the species
• Involves copying the DNA
• Asexual reproduction
• One parent
• Exact copies of adult
• Bacteria- binary fission
• Sexual reproduction
• DNA required from both parents
• Frogs

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All living things
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Grow and Develop

• Unicellular organisms get larger, then divide
• Multicellular organisms grow new cells, tissues,
  organs
• Some organisms undergo a change called
  metamorphosis
• Caterpillar to butterfly
• Tadpole to frog

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All living things
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Respond to Stimuli

• Stimulus any physical or chemical change in the
  environment
• Temperature
• Light
• Touch
• Smell
• Etc..

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All living things
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Exchange Gases

• Main gases involved Carbon Dioxide Oxygen
• Plants take in CO2 release O2
• We do the opposite!
• Some organisms take in sulfur or methane
• Bacteria

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All living things
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Obtain and Use Energy

• Metabolism Rate at which all chemical reactions
  in an organism occur
• Autotrophs make own food
• Photosynthetic- use suns energy
• Chemosynthetic- use chemicals
• Heterotrophs Consume food from outside
• Primary consumers (vegetarians)
• Secondary consumers (meat-eaters)
• Omnivores (eat plants and meat)

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All living things
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Maintain HomeostasisAKA Mrs. Levasseurs
favorite word

• Homeostasis A constant internal environment
• Water balance
• pH
• Temperature
• Requires input from all organelles of a
  unicellular organism
• Requires input from all cells in a multicellular
  organism