Fill in the blanks w/ synapomorphic, symplesiomorphic, or neither: The presence of brain regionalization is a __ feature of tetrapods relative to conditions in other vertebrates, but is a __ feature of Chordata considered alone. The presence of a post-anal tail, a dorsal hollow nerve cord, a notochord, and external gills are __ features of Chordata, __ features of Urochordates, __ features of (cephalochordates + vertebrates) relative to conditions in other organisms.
Fill in the blanks w/ synapomorphic, symplesiomorphic, or neither:
The presence of brain regionalization is a __ feature of tetrapods relative to conditions in other vertebrates, but is a __ feature of Chordata considered alone.
The presence of a post-anal tail, a dorsal hollow nerve cord, a notochord, and external gills are __ features of Chordata, __ features of Urochordates, __ features of (cephalochordates + vertebrates) relative to conditions in other organisms.
Synapomorphic
This characteristic is shared by certain taxa but not by others because the former gained it from a common ancestor who acquired the characteristic after its lineage diverged from the lineages leading to the other species.
Symplesiomorphic
Sympleisomorphic characteristic is a trait that exists in both the common ancestor and the early ancestor of two or more organisms. Sympleisomorphic characteristics have a common ancestor. It describes a racial or ethnic character.
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