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| nothing has changed, nothing will; always the same |
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| 4 thousand years (according to the bible) |
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| species changing over time (fossils as evidence) |
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| geologist- said the earth was 4 million years old (now we know its 4 Billion) |
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| naturalist- compared plants and animals |
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| Origin of Species by Natural Selection, Put every argument he could think of because he was sick |
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| Darwin's theory of natural selection |
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Definition
variation exists within each species, certain characteristics work better in different environments and the traits that work will multiply and the traits that don’t will die out.
,Over time species can be replaced by a new species that is more successful of the same type of species
,Fossils show that species now on earth have evolved from ancestral forms that are now extinct. |
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| had traits that best suited their habitat (the birds beak changed..) |
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| all organisms on the planet are related to one another somehow: based on how things looked |
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| diagram that shows relationships, the closer two species are the more they are related |
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| preserved remains of ancient organisms: bones, imprints, amber |
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| same structures but look and function different depending on what is needed |
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| still exist but are not being used anymore (ex: leg bones on a snake) |
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| If you compare species as they develop you can see the similarities |
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| DNA of eukaryotic organisms have the same basic structure |
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| The development of a new species through evolution- watching species change |
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| changes in a species over LONG periods of time |
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| rapid changes because of a drastic change in the environment |
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| Adaptive Radiation/Divergent Evolution |
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| rapid changes because of a drastic change in the environment |
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| species that live in similar environments develop similar characteristics |
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before industrial revolution: trees white, peppered moth survived
after: trees covered in pollution, dark moth survived |
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| primates split into monkeys and a group with great apes and humans about 36 million years ago |
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| 7 million years ago- stand up on two legs, 19 different species, 7 belong to genus Homo. |
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| Homo habilis, 2 million years ago |
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| 150,000-200,000 years ago |
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| one of the most complete skeletons found. Australopithecus afarnsis- her species name. Legs, hips, and feet like humans. Probably walked on 2 legs. Arms still adapted for tree climbing |
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4.5- 5 billion years old developed form dust and gas
-little water, no oxygen for 1 billion years |
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| 1st living things- Archaebacteria |
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Definition
3.5 million years ago
- Prokaryotic cells- simple cells
-1st because they are simple & the can live in places where nothing else can live- harsh conditions like early earth |
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| 2.5 billion years ago- complex cells |
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| outer membrane of the cell folded into the cell and they found a use for it |
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| different bacteria live together and depend on one another until the point where they couldn’t live apart |
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