| Term | Definition |
|---|
| 1. water 2. ozone 3. magnetosphere | 3 "MUST HAVE" for life on earth |
| panspermia | life came from outer space (asteroid or meteor) |
| timeline of events | 4.6 bya- earth formed, 3.5 bya- oldest known fossils evidence of prokaryotes (1st life form) |
| chemotrophic ---> autotrophic | as the number of chemotrophic cells increase so did the competition for nutrients |
| cytobacteria | mutations provided some cells with the ability to use sunlight for energy, thus making them the 1st photosynthetic or autotrphic bacteria |
| stromatolites | fossilized remains of these bacterial masses |
| anaerobic ---> aerobic | autotrophic, photosynthesis cells began releasing oxygen into the atmosphere |
| prokaryote ---> eukaryote | 2 theories : membrane infolding & endosymbiosis |
| membrane infolding | the membrane turns inward creating specialized pockets of inner membrane that eventually became the cell's organelles |
| endosymbiosis | small, free-living procaryotes capable of photosynthesis or aerobic respiration were preyed upon by larger prokaryotes. |
| invertebrates, fish, land plants, insects/spiders, amphibians, reptiles, dinosaurs, mammals, birds, modern mammals, hominids (early humans) &, modern humans. | what is the correct placements of evolution? |
| the mass extinction that wiped out nearly 95% of life on earth. | what was the main event that led to the changing of era's from the patezoic era to the mezozoic era? |
| legs. | in order for a water animal to live on land what feature (not internal organs) must the organism have? |
| the cambrian explosion, body plan (genes), climate change, and the mass extinction | what main events happened during the patezoic era? |
| the mass extinction, the impact, and climate change | what happened during the mezozoic era? |
| cenozoic era | what era are we currently in? |
| rocky mountains form, & maybe a mass extinction | what is now happening in the cenozoic era? |
| EON, ERA, Period, EPOCH | what is the time units of geological time scale in order from longest to shortest time spand? |
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