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evolution
to change or evolve
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natural selection
organisms with favorable traits
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artificial selection
humans get involved and decide what traits are the most favorable
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charecterstics of life
- 1)composed of cells
- 2)maintains homeostasis
- 3)reproduce
- 4)uses energy
- 5)responds to stimuli
- 6)shows levels of organizations
- 7)grows and develops
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1)cell structure and function
- cell basic units of life
- can be unicellular (1 cell)
- or multicellular (many cells)
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2)stability and homeostasis
- organisms must maintain very stable internal conditions - homeostasis
- ex. temp, water content, chemical content
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3)reproduction
- all living this must be able to reproduce
- sexually or asexually
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4)energy use
- uses energy in a process called metabolism
- sum of all chemical processes
- require energy to maintain their molecular and cellular organization
- autotrophs - makes energy
- heterotrophs - consume energy
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5) responsivness
- responds to stimuli in the external environment
- detect and respond to changes in light, heat, sound and chemical and mechanical contact
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6)organization
- organized at both the molecular and cellular levels
- take in substances from the enviroment and organize them in complex ways
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7)growth and devolpment
- growth occurs as the result of cell division and cell enlargement
- development - is the process by which an adult organism rise
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aero
needing oxygen or air
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-stasis
stationary condition
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-synthesis
to build or make
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