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Evidence of evolution

MAIN POINT:
"All living things are related"

We'll be studying Cetaceans.
1. Comparative anatomy - whales look like fish, but have placentas and give milk to their young, have gills, are warmblooded, they have lungs, they have blowholes (almost like nostrils... looks like a nose), whales have hair, they have arm, wrist, hand, and finger bones... they have a strange pair of bones where their legs could be
2. embryology and development - dolphin and human embryos look very similar (arm+leg buds), early on, dolphins have nostrils ANCESTORS OF WHALES WERE ONCE ANCESTORS OF LAND ANIMALS???
3. fossil record - two whale skeletons have nostrils in the middle of their skull (in-between)... they have fully developed legs, maiacetus (whale) lived in ocean but had short legs, fingers, and arms "WALKING WHALE" these "in-between" whales prove that whales evolved from land creatures
4. DNA - researchers can compare DNA, and the closest match for a whale was a HIPPO. (Both evolved from a common ancestor.) They share many strange features.
1. they both have special ankle bones
2. Both nurse young under water
3. no fur
4. One of few animals to have internal testicles
     
 
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