Chapter 21 Notes

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Chapter 21 Notes

  1. 1. Chapter 21-1 Species Interactions Notes and Organizer Predation Predator- Prey- Natural Selection A predator’s survival depends on Mimicry Deception In a defense called The harmless mimic
  2. 2. Plant-Herbivore Interactions Animals that eat plants are called Through natural selection Physical defenses such as Plants have also evolved They synthesize chemicals Examples are Many medicines are Parasitism Parasitism-
  3. 3. Parasite- Host- Ectoparasites- Endoparasites- Competition Competition results from Niche overlap Competitive exclusion One species uses Competition and Community Structure Character Displacement-
  4. 4. Finches have The finches do not Competition is most intense between Resource partitioning- Examples are Competition is less intense Mutualism and Commensalism Mutualism- Some mutualistic relationships are
  5. 5. Pollination Commensalism- One example is The buffalo is not Essential Questions 1. Explain how predators differ from parasites. Give an example of each kind of organism. 2. Some harmless flies resemble bees and wasps. What is this mechanism called? Evaluate its importance as a defense mechanism. 3. Describe two chemical defenses of plants.
  6. 6. 4. Explain the advantage of character displacement and give an example. 5. How can similar birds occupy the same area without occupying the same niche?

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