Please enable JavaScript.

Coggle requires JavaScript to display documents.

Tetrapods (Derived Traits (in most cases adults lack gills, Head separated…

- - - - Upper and lower shells fused together through vertebrae, collar bones, and ribs
      - uncertain phylogenetic relationship
      - live in very diverse habitats
      - 307 Species
    - - Adaptations for hunting and capturing prey
        
        heat detecting organs in head
        
        Olfaction (tongue flicks)
        
        venom
        
        Chemoreceptors
      - Carnivores
      - Snakes descended from lizards with legs (legless lizards)
      - 7,900 species within Lepidosaurs
    - - Evolved from dinosaurs 160 MYA and extant species emerged 65.5 MYA (Cambrian explosion)
      - Modifications for flight (some related to reduced weight)
        
        no teeth
        
        reduced organs (no bladder, 1 ovary, small gonads)
        
        feathers with beta-keratin
        
        Honeycombed bones
        
        large pectoral muscles for flapping
        
        Wings
      - larger brains and more acute senses than other reptiles and amphibians
      - 10,000 Species
    - - Snakes/lizards are ectotherms
      - Internal fertilization leads to shelled eggs being laid on land (even in aquatic species)
      - Birds are endotherms
      - Feathers or scales that contain keratin that prevent dessication