Download Bell Work: What characteristics do all living things share? Monday

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August 26, 2013
Monday, August 26
Bell Work:
What characteristics do all living things share?
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section1.1.notebook
August 26, 2013
Biology
Unicellular
Multicellular
cells
energy
Chemical
some use chemicals from the environment
plants, algae, some bacteria use sunlight, stored as chemical energy.
Animals eat other organsims.
metabolism
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stimuli
Development
DNA
sexual reproduction
mature
grow
Reproduction
asexual
DNA
RNA
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Biosphere
-terrestrial
Biodiversity
-aquatic
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10,000
50,000
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Unifying Themes of Biology
Systems- Exist on all scales
- molecules inside cells that work to produce and
use energy
-entire biosphere
-ecosystem
-Can be two organisms interacting
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Structure and Function
Structure determines function!
Example: You have sharper front teeth that are for tearing
you food and flatter back teeth that are for grinding your
food.
Brain cells process information
Red Blood Cells transport oxygen
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Homeostasis
-Maintenance of constant internal conditions
-Cells function best under a limited range of conditions
-Ex. Temperature, blood sugar, acidity, etc.
-Breakdowns in homeostasis can be deadly
-Works through negative feedback
-you get cold, muscles cause you to shiver, blood vessels
constrict
-also behavioral- reptiles moves into sun when cold.
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Evolution
-Changes in a species overtime
-a long term response to the environment
-Adaptations- trait or behavior that allows species to survive
and reproduce
-Accounts for unity and diversity of organisms
-different environments need different adaptations
Humans and Bacteria- both have DNA, RNA, similar source of
energy, similar cell structure
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