The evolution of the synapsid amniote lineage resulted in modifications of the jaws and teeth,the incorporation of 2 more bones into the middle ear (in addition to the stapes),and elongation of legs to hold the body higher off the ground.This lineage includes modern-day _________.

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The evolution of the synapsid amniote lineage resulted in the development of mammalian characteristics, such as modifications to the jaws and teeth, elongation of legs to hold the body higher off the ground, and incorporation of 2 more bones into the middle ear (in addition to the stapes). Therefore, modern-day mammals are the best choice for this question.

The Evolution of the Synapsid Amniote Lineage Resulted in Modifications