BIOL 172 Lab Prelab Quiz 12: Mammals
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List three characteristics shared by all mammals?
- Three middle ear bones
- Mammary glands
Discuss the origin of the pig in Hawaii?
What is the length of the estrous cycle in pigs? How does this compare in humans?
- Pigs: 21 days
- Humans: 28 day menstrual cycle
What is the gestation periods in the pig? How
long in humans?
- Pigs: 112-115 days
- Humans: 280 days
Which is more distal to the elbow - the wrist or the hoof?
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