The evolutionary distinction between pigs (Artiodactyla) and tapirs (Perissodactyla) is rooted in which structural difference?
Answer
The number of toes on each foot (odd vs. even)
Artiodactyls, like pigs, generally bear weight on an even number of toes, whereas Perissodactyls, like tapirs, have an odd number of toes on each foot, typically three on the hind foot.
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Tapir Facts - The Elephant Pony Pig - Animal a Day T Week - YouTube
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