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What is Biology? Chapter 1
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Characteristics of life outline
Biology: Organisms: Organization cells -> ___ ___ ___ specialization Reproduction asexual sexual Growth Development Adjust Stimulus/Response Homeostasis 5. Adapt/Evolve
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Biology: study of life Organisms: living things
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What determines life? 5 characteristics that all living things must have!
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1. Organization: Made of cells!! Cells tissues organs organ systems
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Single-cell organisms have everything they need to be self-sufficient
Single-cell organisms have everything they need to be self-sufficient. In multicellular organisms, specialization increases until some cells do only certain things.
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2. Reproduction: must occur for a species to survive
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Species ·Organisms that look alike and can mate among themselves.
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Same Species Not Same Species
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Reproduction can be: --Asexual: One parent makes identical offspring.
Sexual – two parents, offspring is hybrid of those parents
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3. Growth/ Development: Growth: Increase in size Development:
Changes from embryo to adult
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4. Adjust to Surroundings:
Stimulus: triggers a reaction Response: the reaction to the stimulus. Homeostasis: Regulate internal environment Ex. Sweating when hot, shivering when cold
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5. Adapt/ Evolve: Adaptations are traits giving an organism an advantage in a certain external environment. Ex. Polar bears have thick fur, fish have gills Survival of the fittest!
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Locomotion (Movement):
Not all organisms move (ex. Sponge is an animal that is sessile; mushroom is fungi that does not move from place to place.)
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