Evolution of Eukaryotes. Invertebrates Lacking a backbone Examples – Jellyfish – Sponges –...
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Transcript of Evolution of Eukaryotes. Invertebrates Lacking a backbone Examples – Jellyfish – Sponges –...
Evolution of Eukaryotes
Invertebrates
• Lacking a backbone
• Examples– Jellyfish– Sponges– Crabs
DIVIDING LINEInvertebrates to Vertebrates
No Backbone to BackboneIncreased specialization and movement of
organisms begins
Fish
• Scales• Gills—Breath Underwater• Soft eggs– 1 exception - Sharks
• Aquatic Life• 2 Chambered Heart
Amphibians
• Skin• Gills/Lungs• Soft Eggs• 2 Chambered Heart• Appendages
Reptiles
• Scales, protection (dessication)• Lungs• Hard eggs• Appendages or Loss of Appendages• 3 Chambered Heart* Crocodiles
Dinosaurs• Scales• Lungs• Hard eggs• Terrestrial + Aquatic• Birds Descended• Appendages
Birds
• Feathers– Modified scales
• Lungs• Hard eggs• Live on land• Flight• Hollow Bones• 4 Chambered Heart• Homeothermic
Mammals
• Hair/Fur• Lungs• Hard eggs/Live birth• Mammary Glands• Four Chambered Heart• Homeothermic
Primates
• Skin/hair• Lungs• Live birth• Terrestrial/Trees• Tactile Fingers/Toes• Opposable Thumbs*• Intelligence• 4 Chambered Heart• Homeothermic
Humans
• Hair• Lungs• Live birth• Terrestrial• Higher Intelligence• Opposable Thumb• 4 Chambered Heart• Homeothermic• Bipedalism