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Biology Project

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Phoebe Dannatt

on 5 August 2013

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Transcript of Biology Project

12-14 inches tall
4 hooved toes on fore feet
3 hooved toes on hind feet
Long head with 44 teeth

The Eohippus was discovered sixty million years ago. It was only two feet tall with four functional toes that laid flat on the ground. It lived in the forest making it easy to hide for its predictors.
22-24 inches tall
One main toe, still have two extras
The head is longer and larger
Eyes are set further apart

Twenty million years ago the Oligohippus was found. This animal was slightly larger then Eohippus but lived in the forest as well. This one had three functional toes but the forth had disappeared.
34-36 inches tall
The jaw was deeper
Head and brain was larger
The middle toe developed into a hoof
It started to graze on open grassland

17 million years ago the Merychippus was discovered. This one was pony sized but had an even bigger skull then the Oligohippus. It had three toes with only one functional center toe. The Merychippus lived in grassland making it easy for prey. This ment it had to have longer and stronger legs to run away.
48-50 inches tall
Two dysfunctional toes attached to
the hoof
Skull is bigger
Body is more muscular

Seven million years ago they found what is known as the Pliohippus. The Pliohippus forelegs remained the a single hoof with two toes. It was a lot lighter and was more agile.
Evolution of Horses
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