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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