Vocabulary

endothermy mammary gland synapsid therapsid monotreme oviparous marsupial viviparous placental mammal placenta figure 43-1

Lions have the six key characteristics of mammals.

figure 43-1

Lions have the six key characteristics of mammals.

Birds and reptiles

Marsupials

Mammals

Synapsids

Amniotes fx

Marsupials n

Placental mammals

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