Animals

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  • Animals
    • Pyramids of biomass
      • Construction
        • Less energy and biomass as you move up
          • e.g 100 dandelions -> 10 rabbits -> 1 fox -> 500 fleas
        • One
          • Each bar on the pyramid shows how much all the organisms weigh in that section
            • | Fox |          | Rabbits |    | Dandelions |
              • Biomass pyramids are always pyramid shapes
        • Two
          • Biomass pyramids are always pyramid shapes
        • Bar at the bottom - producer (plant)
    • Variation
      • Organisms of the same species have differences
        • Genetic variation
          • Caused by different genes
          • Inheret genes from parents
            • Passed on in gametes
            • Causes genetic variation
            • No two organisms of the same species are exactly alike (apart from identical twins)
        • Environmental variation
          • Any difference caused by the environment you are in (tan)
        • Most characteristics are from genetic and environmental variations

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