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Fossils and shit.
it's about fossils.........yea.
| Question | Answer |
|---|---|
| Evolution is? | A gradual process if change over time. |
| What are the 2 types of evolution? Explain what they are. | Organic- gradual change over time Geographical- Gradual change in earths appearance |
| The strongest evidence we have to an organic evolution. | Fossils |
| Scientist compare ancient organisms with modern day organisms and can tell whether organic evolution has occured. | Fossils |
| Preservative Material | Fossils |
| Organisms likely to be preserved in amber,tar,and ice. | AMBER- insects TAR- saber-tooth tiger, woolly ICE- Mammoth a range of different specimens |
| Where are most fossils found? | Sedimentary rock |
| Where are sedimentary rock formed? | In a layered structure. The oldest layer are usually at the bottom. |
| Index fossils are? | Fossils of organisms that lived a short time and became extinct quickly. Scientist use these fossils to help them date other ones. |
| Radioactive dating | Use of isotopes to determine the absolute age of rock layers. |
| Geological time scale | Is divided into intervals of time; eras. It's a summary of various types of |
| what are the 4 eras? | Precambrian, paleozoic, mesozoic, cenozoic |
| Earliest known organisms are? | Fungi, Bacteria, and stromatilites |
| Variations are? | Trait differences between same species |
| Gradualism? | Darwins theory, a species changes over time. |
| Punctuated equalibrium? | An evolutionary theory; species evolves suddenly and rapidly |
| Favorable trait | Charactistics og an organism that help them survive |
| Natural selection | Process of environment choosing traits of an organism |
| Geographic isolation | Seperation of species by land |
| Reproductive Isolation | Genes become so different they can no longer interbreed....... example; a human and a horse. We cannot make human ponies. |
| Darwins theory | Inculdes natural selection failed to explain variation |
| LaMarck's theory | The more an organism uses a body part the stornger it will get and the new body part will be passed down to the youngster.... FAMILY BODY LOOM!!!! |
| Speciation | Traits vary so much in a sepecies it causes a new one. |
| Modern theory | Happenens to the population not indivuals |
| Adaptive radiation | Process bu which a species evolves into a number of different species. |
| Diversity | Organisms of same species vary in traits |
| Gene pool | Total number of inheritable traits |
| Gene frequency | How often a gene appears wthin a species |
Created by:
kuryami_uzumaki
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