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Bio204
Lecture 10 - Berta
4
Biology
Undergraduate 3
12/14/2010
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Term
Apomorphies of Animals
 Definition
1. Mammary glands
2. Hair
3. New jaw Joint (single lower jaw bone, dentary)
4. Middle Ear with 3 bones
5. Endothermy
6. 4-Chambered heart
7. Heterodont dentition
8. Muscular thoracic diaphragm
Term
Major clades of living mammals & Examples
 Definition
1. Monotremata - Playpus and echidna
2. Theria - Marsupials and placentals
Term
Placental groups
 Definition
-Xenarthra
-Boreoeutheria
-Afrotheria
Term
Monotremata Characteristics
 Definition
-Egg laying (not an apomorphy
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