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Biology 5410

Biology 5410 . Review. Classifying Organisms. You discover a new vertebrate. What data can you collect to compare it to other vertebrates? Anatomical: Bone Structure Reproductive Features Other structures (vestigial?) DNA comparison. Succession.

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Biology 5410

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  1. Biology 5410 Review

  2. Classifying Organisms • You discover a new vertebrate. What data can you collect to compare it to other vertebrates? • Anatomical: • Bone Structure • Reproductive Features • Other structures (vestigial?) • DNA comparison

  3. Succession • The predictable pattern with which species colonize disturbed or “virgin” areas.

  4. Experimental Data

  5. Conclusions • Number of species and rate of establishment for: • Herbs • Shrubs • Trees

  6. Prediction • Will the number herb species increase by year 100 or have they already saturated this environment? • What about shrubs? • What about trees?

  7. Energy Transfer and Impacts • Remember that total biomass (amount of organic material) decreases as we move up a food chain. • DDT is a chemical pesticide that doesn’t deteriorate naturally.

  8. Example

  9. Conclusions • How can we explain the increase in DDT concentration as we move up the food chain? • Bioaccumulation: The same amount of DDT is concentrated in a smaller proportion of the ecosystem’s species.

  10. Species Evenness and Competition • Richness refers to the number of unique species in an ecosystem. • Evenness refers to the relative proportions of species in an ecosystem.

  11. Experimental Data

  12. Conclusions • What happened to the richness? • Compare the evenness between years. • What can we say about the effects of nitrogen on these species?

  13. Cardiovascular System

  14. Questions • Is oxygen leaving or entering the blood stream? • Is carbon dioxide leaving or entering the blood stream? • Where does this occur in the body? • What circuit is this?

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