Term
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Definition
| precursors to current cells; fluid filled vesicles |
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Term
| First genetic material was probably |
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Definition
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Term
| Why was RNA probably the first genetic material? |
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Definition
| RNA has ribosomes known to catalyze many different reactions |
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Term
| Fossils favor species that... |
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Definition
| 1. Existed for a long time 2. Existed in many different environments 3. Have hard bones |
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Term
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Definition
| Molecules have isotopes that decay at a constant rate |
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Term
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Definition
Archean Eon
Protozoic Eon
Pharenozoic Eon |
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Term
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Definition
Paleozoic Era
Mesozoic Era
Cenozioc Era |
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Term
| What Eon did multicellular organisms start to exist |
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Definition
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Term
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Definition
| oldest known fossils of bacteria |
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Term
| When did oxygen start accumulating in the atmosphere? |
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Definition
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Term
| Eukaryotes occured ___ billion years ago |
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Definition
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Term
| Eukaryotic cells resulted probably from________ |
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Definition
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Term
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Definition
| one organism living inside the other for the benefit of both |
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Term
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Definition
| sudden appearance of many fossils resembling that of modern animals found in the Cambrian Period |
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Term
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Definition
| Plants, animals, and fungi began colonizing land 500 million years ago |
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Term
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Definition
| Vertebrate animals characterized by having four limbs with digits |
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Term
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Definition
| Supercontinent formed by all continents combined together |
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Term
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Definition
| evolution of diversly adapted species as a result of new environmental opportunities |
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