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1.1 The Study of Life
KEY CONCEPT Biology is the scientific study of all forms of life.
1.1 The Study of Life
All organisms share certain characteristics.
1.1 The Study of Life
Characteristics of Life
1. Organization -Living things are organized-cells, tissues, organs, organ systems, organisms.
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.
1.1 The Study of Life
3. Living Things Grow
• Cells enlarge and divide
1.1 The Study of Life
4. Living things Develop through stages of Life
1.1 The Study of Life
5. Living things adjust and respond to their environment- Homeostasis
• Homeostasis is the maintenance of constant internal conditions.
1.1 The Study of Life
6. Living things adapt and evolve
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.
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
1.1 The Study of Life
• Every part of the biosphere is connected with every other part.
1.1 The Study of Life
– saltwater and freshwater environments
– portions of the atmosphere
Tidepool Estuary
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.
1.1 The Study of Life
– All organisms are made of one or more cells.
1.1 The Study of Life
Living things have DNA that they pass on to offspring.
1.1 The Study of Life
