1.1 the study of life key concept biology is the scientific study of all forms of life
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1.1 The Study of Life
KEY CONCEPT Biology is the scientific study of all forms of life.
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1.1 The Study of Life
All organisms share certain characteristics.
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1.1 The Study of Life
Characteristics of Life
1. Organization -Living things are organized-cells, tissues, organs, organ systems, organisms.
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1.1 The Study of Life
– Members of a species can interbreed to reproduce. – There are about 2 million different living species
have been identified.
2. Living things Reproduce- essential for the continuation of life
• A species is one particular type of living thing.
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1.1 The Study of Life
3. Living Things Grow
• Cells enlarge and divide
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1.1 The Study of Life
4. Living things Develop through stages of Life
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1.1 The Study of Life
5. Living things adjust and respond to their environment- Homeostasis
• Homeostasis is the maintenance of constant internal conditions.
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1.1 The Study of Life
6. Living things adapt and evolve
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1.1 The Study of Life
Living things need energy for metabolism-must produce or consume energy
• Must consume 20% of body weight per day.
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1.1 The Study of Life
Living species are diverse
• The biosphere includes all living things and all the places they are found.
biosphere = everywhere life exists
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1.1 The Study of Life
• Every part of the biosphere is connected with every other part.
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1.1 The Study of Life
– saltwater and freshwater environments
– portions of the atmosphere
Tidepool Estuary
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1.1 The Study of Life
– Biodiversity generally increases from the poles to the equator.
– Biodiversity is greater in areas with consistently warm temperatures.
• Biodiversity is the variety of life.
Biodiversity is greater closer to the equator.
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1.1 The Study of Life
– All organisms are made of one or more cells.
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1.1 The Study of Life
Living things have DNA that they pass on to offspring.
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1.1 The Study of Life