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Today’s AIM: Is living off of another always a bad thing?

Unit 7: Why are there so many different plants and animals?. Today’s AIM: Is living off of another always a bad thing? DO NOW: Read The Ice Age’s Fiercest Predator and construct an energy pyramid to represent an Ice Age ecosystem. How are these organisms interacting with each other?.

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Today’s AIM: Is living off of another always a bad thing?

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  1. Unit 7: Why are there so many different plants and animals? Today’s AIM:Is living off of another always a bad thing? DO NOW: Read The Ice Age’s Fiercest Predator and construct an energy pyramid to represent an Ice Age ecosystem

  2. How are these organisms interacting with each other? “SYMBIOSIS”

  3. 1. Parasitism When one organism (the parasite) lives in/on another organism (the host) and benefits at its expense. (, ) The CordycepsFungus: http://www.youtube.com/watch?v=XuKjBIBBAL8 Why is this an example of parasitism?

  4. Stop & Jot Parasites rarely kill their hosts right away. Instead they keep them alive as long as needed. In fact, the best parasites never actually kill their hosts, though they may weaken them significantly. Explain why parasites would not want to kill their hosts immediately. _____________________________________________________________________________________________________________________

  5. 2. Commensalism When one organism benefits, and the other isn’t helped or harmed (, ) WHO SAID THAT??! Nom nomnom Why is this an example of commensalism?

  6. 3. Mutualism When organisms do things that benefit each other (, ) Why is this an example of mutualism?

  7. PARTNER PRACTICE • Directions: Read each of the relationship scenarios below. Identify the two organisms involved in the boxes labeled ‘Organism 1’ and ‘Organism 2’, and identify whether they benefit, are harmed, or are neutral in the relationship. Lastly, classify what type of symbiosis each example is in the third column.

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