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22 Cards in this Set
- Front
- Back
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stromatolites |
"rock beds" rocks that are characterized by a distinctive, layered structure |
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evidence for early origin of life (3) |
stromatolites isotopic analysis microfossils |
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Miller-Urey experiment |
an experiment testing the sea and atmosphere of earth building blocks of life form naturally and abundantly |
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RNA world |
DNA-based life may have arisen from a world where RNA molecules served both as genes and as chemical catalysts for copying and expressing those genes |
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areas with significant amounts of organic molecules that could serve as building blocks for more complex molecules (3) |
atmospheric chemistry chemistry near deep-sea vents molecules brought to earth from space |
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anaerobic |
it did not require molecular oxygen |
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aerobic |
cannot survive without molecular oxygen us |
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chemoautotrophs |
organisms that obtained their carbon from carbon dioxide dissolved in the oceans and their energy from chemical reactions involving inorganic chemicals |
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symbiotic relationship |
both the invading organisms and the host organisms benefited form living together |
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mitochondria |
the cellular organs in which oxygen helps produce energy (by making molecules of ATP) |
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chloroplasts |
structures in plant cells that produce energy by photosynthesis |
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phyla |
the next level of classification under kingdom that animals are grouped into |
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chordata |
the phyla mammals and reptiles are grouped into |
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arthropoda |
the phyla insects, crabs, and spiders belong to |
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cambrian explosion |
the remarkable flowering of animal diversity that started 542 million years ago |
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oxidation reactions |
chemical reactions that remove oxygen from the atmosphere |
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cyanobacteria |
blue-green algae responsible for large oxygen production on earth |
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K-T boundary |
thin layers of sediments that mark the Cretaceous-Tertiary boundary rich in iridium (rare on earth) |
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mass extinction |
the rapid extinction of a large percentage of all living species |
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meteors |
small particles that hit earth but burn up in our atmosphere |
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cultural evolution |
changes that arise from the transmission of knowledge accumulated over generations |
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technological evolution |
duh |
