Warm-up
• What makes something alive?
Six Characteristics of Living Things
1. All living things are composed of cells.2. Complex organization patterns are found in all living
organisms.3. All organisms use energy.4. All organisms have stable internal conditions which
must be maintained in order to remain alive.5. All organisms grow and change.6. All organisms reproduce in order to continue the
species’ life.
1. All Living Things are Composed of Cells
Two types of cells:1. Prokaryotic Cells
Most are single- celled organisms
2. Eukaryotic Cells
Prokaryotic CellEukaryotic Cell
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2. Complex Organization Patterns
• Atomic Level• Molecular Level• Organelle Level• Cellular Level• Tissue Level• Organ Level
2. Complex Organization Patterns• Organism Level• Population Level– Group of same species
• Community Level– Groups of different
species• Ecosystem Level– Living and non-living
elements• Biosphere Level
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Which level of organization is represented here?
Ecosystem
3. All Organisms use EnergySunlight
Producers (plants and other photosynthetic
organisms)
Consumers (including animals)
Chemical Chemical EnergyEnergy
Heat
Heat
• Metabolism: All of the chemical reactions that occur within an organism.– Catabolism: Breaks larger molecules down into
smaller molecules to produce energy (i.e., Cellular Respiration)
– Anabolism: Uses energy released by catabolic pathways to create cellular components (i.e., Photosynthesis)
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3. All Organisms use Energy
4. All organisms have stable internal conditions which must be maintained in order to remain
alive. This is called homeostasis.
37⁰C Acceptable Range
Brrr…. Shiver… I am so cold!
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5. All organisms grow and change.
a. Changes occur during the life cycle of an organism.
b. Some changes are inherited, which over time are called __________.adaptations
5a. Changes occur during an organism’s lifetime
• Differentiation: The process by which cells become increasingly different and specialized
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5b. Organisms Adapt Back to Menu
• The inheritance of adaptations over time is evolution.
6. All organisms reproduce1. Some organisms
reproduce sexually.
2. Some organisms reproduce ________.asexually
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