Crocodiles

Evolution & Natural selection

• theory
• a system of rules, procedures, & assumptions used to produce a result
• evolution
• any process of formation or growth; development

NATURAL SELECTION

• the process by which organisms with better traits adapt better to specific environments and reproduce more than that of a different/earlier variety of the same species

PRICIPLES OF NATURAL SELECTION

XILOUSUCHUS TO DOSWELLIA

• Sail is gone
• Doubled in size
• Still in swamps
• Carnivore to omnivore

DOSWELLIA TO PROTOSUCHUS

• Omnivore to Carnivore
• Lives on riverbeds
• Halved in size
• Armour plates
• Lizard like

PROTOSUCHUS TO DAKOSAURUS

• Lives in shallow seas
• Body mass increased
• Carnivore to seafood
• Legs to flippers
• No armour plates

DAKOSAURUS TO DEINOSUCHUS

• Doubled in size
• Seafood and land diet
• Lives in river and on land
• Legs
• Dinosaur-like head to long flat skull

DEINOSUCHUS TO RHAMOHOSUCHUS

• Increased in body mass
• Carnivore
• Swamp habitat
• Pointy snout
• Short legs

RHAMPHOSUCHUS TO CROCODILIAN

• Wider jaw
• Carnivore
• Land and water
• Scales

WHAT'S NEXT?