| 1) | What were the primary changes in the marine biosphere in the late Paleozoic? |
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| 2) | Which three groups of fishes appeared during the Devonian radiation? |
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| 3) | Of these three, which groups are still around today? |
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| 4) | List three problems that plants had to overcome when moving onto land? |
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| 5) | What environmental factors may have compelled plants to move onto land? |
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| 6) | Why was the evolution of the seed an important for plants? |
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| 7) | List three problems that animals had to overcome when moving onto land? |
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| 8) | What environmental factors may have compelled animals to move on to land? |
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| 9) | Which fish group is the likely ancestor of the first amphibians? |
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| 10) | Which group of land animals developed a reproductive strategy that allowed greater colonization of the continents? |
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| 11) | What was the key component of this reproductive strategy? |
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| 12) | Match the following organisms with their level of sophistication |
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A. Rhyniophytes
B. Progymnosperms
C. Ichthyostega
D. Dimetrodon
E. Therapsids
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1. tetrapod, aminotic egg, internal thermoregulation
2. xylem, phloem, and seeds
3. tetrapod
4. xylem
5. tetrapod, aminotic egg
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| 13) | Match the following organisms with when they appeared in geologic time. |
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A. Progymnosperms
B. Therapsids
C. Hylonomus
D. Rhyniophytes
E. Ichthyostega
F. Placoderms
G. Conifers
H. Pelycosaurs
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1. Silurian
2. Devonian
3. Carboniferous
4. Permian
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