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3792755
VERTEBRATES
Description
GCSE Sciences (Biology for GCSE) Mind Map on VERTEBRATES, created by c_asvisio on 16/10/2015.
No tags specified
hemichordates & chordates
vertebrate zoology
sciences
biology for gcse
gcse
Mind Map by
c_asvisio
, updated more than 1 year ago
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Created by
Litty Carter
about 9 years ago
Copied by
c_asvisio
about 9 years ago
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Resource summary
VERTEBRATES
Cambrian era
Cranium, brain, paired eyes, vertebral column
Cartilage and bone. Duplicate Hox gene complex
Neural Crest
Key Evolutionary Steps
1. HEAD: Craniates, complex movement and feeding
2. VERTEBRAL COLUMN: support
3. JAWS: predatory life
4. BONE: replaces cartilage support
5. LUNGS: Breathing air
6. LEGS: move on land
7. AMNIOTIC EGG: reproduce out of water
8. INSULATION: feathers/fur
9. MILK: suckling young
EXISTANT GROUPS
Myxinoidea
Hagfish
Petromyzontia
Lampreys
Chondrichthes/Elasmobranchii
Cartilaginous fish
Osteichthyes
Bony fish
Amphibia
Frogs, toads, newts, salamanders
Reptilia
Crocodilians, snakes, dinosaurs
Aves
Birds
Mammalia
Mammals
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