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Investigation 8 2b
 

Investigation 8 2b

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    Investigation 8 2b Investigation 8 2b Presentation Transcript

      • What factors determine the rate at which a population can increase in size?
      Reproductive Potential
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    • What might happen to the populations of walkingsticks and birds in the bush environment over time?
    • Limiting Factors
      • Besides predation by birds, what other factors might limit the walkingstick population?
      • Are these factors biotic or abiotic?
    • Migrating Birds
    • Webbed Feet
    • Swimming Upstream
    • Long Legs
    • Nocturnal Hunting
    • How would you describe these organisms?
    • FEATURE
      • Any general structure, characteristic, or behavior of an organism
        • Wings, fur, pattern, color and migration
        • ALL have this
    • TRAIT
      • The specific expression of a feature in an individual
        • Wing length, number of spots, thickness of fur, intensity of color, timing of migration
        • SOME have this
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    • VARIATION
      • When there are several traits for the same feature in a population
        • One example are the 3 different colors exhibited by walking sticks
      • Allows a population to survive even if the environment changes
    • Reflection page 68
      • Draw and color an illustration of an organism or organisms and identify the feature, trait and variation included in your picture.