| 1) | What are stromatolites? |
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| 2) | What type of organism produces modern stomatolites? |
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| 3) | Why are stromatolites, a common Precambrian trace-fossil, rare today? |
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| 4) | Where are the oldest fossils on the earth found? |
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| 5) | What type of rock are most Precambrian microfossils found in? |
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| 6) | What major change occured in the earth's hydrosphere and atmosphere during the Archean? |
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| 7) | List three lines of evidence for this change. |
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| 8) | What is the probable cause for this change? |
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| 9) | List two ways that increasing O2 levels could help evolution of metazoans |
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| 10) | List four primary differences between prokaryote and eukaryote cells. |
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| 11) | Match the following structures in Eukaryote cell with its function |
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A. Nucleus
B. Mitochondria
C. Chloroplast
D. Cell Membrane
E. Cilia
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1. locomotion
2. perform photosynthesis
3. store genetic material
4. perform respiration
5. provide an expandable boundry
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| 12) | List three lines of evidence that suggest mitochondria and chloroplasts evolved from an endosymbiotic relationship with bacteria |
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| 13) | What are metazoans? |
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| 14) | Which fossil group provides the earliest evidence of metazoan life? |
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| 15) | Recent discoveries in China indicate that the presence of which metazoan group at 570 Ma? |
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| 16) | Where were the first obvious metazoan macro-fossils discovered? |
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| 17) | How old are the oldest Ediacaran fauna fossils? |
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| 18) | Most of the Ediacaran fauna is thought to be representatives of which metazoan phyla? |
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| 19) | List two other phyla that may have ancestors in the Ediacaran fauna. For each phyla, list the name for the potential ancestor. |
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