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The following diagram shows the forelimb structure of an extinct species of mammal. Each circle represents a wrist bone, and three digits extend from the wrist.


The forelimbs below belong to four species that descended in a direct line from the ancestral mammal shown above. Of the four descendants shown, which species most likely appeared earliest in evolutionary history?

The Following Diagram Shows The Forelimb Structure Of An Extinct Species Of Mammal Each Circle Represents A Wrist Bone And Three Digits Extend From The Wrist Th class=
The Following Diagram Shows The Forelimb Structure Of An Extinct Species Of Mammal Each Circle Represents A Wrist Bone And Three Digits Extend From The Wrist Th class=

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