VERTEBRATES

Description

GCSE Sciences (Biology for GCSE) Mind Map on VERTEBRATES, created by c_asvisio on 16/10/2015.
c_asvisio
Mind Map by c_asvisio, updated more than 1 year ago More Less
Litty Carter
Created by Litty Carter over 8 years ago
c_asvisio
Copied by c_asvisio over 8 years ago
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Resource summary

VERTEBRATES
  1. Cambrian era
    1. Cranium, brain, paired eyes, vertebral column
      1. Cartilage and bone. Duplicate Hox gene complex
        1. Neural Crest
      2. Key Evolutionary Steps
        1. 1. HEAD: Craniates, complex movement and feeding
          1. 2. VERTEBRAL COLUMN: support
            1. 3. JAWS: predatory life
              1. 4. BONE: replaces cartilage support
                1. 5. LUNGS: Breathing air
                  1. 6. LEGS: move on land
                    1. 7. AMNIOTIC EGG: reproduce out of water
                      1. 8. INSULATION: feathers/fur
                        1. 9. MILK: suckling young
        2. EXISTANT GROUPS
          1. Myxinoidea
            1. Hagfish
            2. Petromyzontia
              1. Lampreys
              2. Chondrichthes/Elasmobranchii
                1. Cartilaginous fish
                2. Osteichthyes
                  1. Bony fish
                  2. Amphibia
                    1. Frogs, toads, newts, salamanders
                    2. Reptilia
                      1. Crocodilians, snakes, dinosaurs
                      2. Aves
                        1. Birds
                        2. Mammalia
                          1. Mammals
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