Bottom of the ocean
tunicates and lanceletes
Cephalochordates e.g. Amphioxus ,; tunicates , acorn worms etc. are nonvertebrate chordates , they are collctively called protochordates .
Evidence indicating that vertebrates and nonvertebrate chordates share a common ancestor includes the presence of key chordate characteristics, such as a notochord, dorsal nerve cord, pharyngeal slits, and a post-anal tail, observed in both groups during their embryonic development. Molecular and genetic studies also reveal significant similarities in DNA sequences and developmental pathways between vertebrates and nonvertebrate chordates like tunicates and lancelets. Additionally, fossil records show transitional forms that highlight evolutionary links between these groups.
Chordates are the organisms that have a rod like cartilagenous structure called notochord which gives rise to nervous system. These have pharyngeal gill slits. Nonchordates are the organisms that do not have a notochord. These do not have pharyngeal gill slits.
No. Porifera is a nonvertebrate phylum which includes sponges.
Thou lobe-finned fish, good sir.
Chordates are the common ancestors of fish and sharks. They include lampreys and other types of primitive fish species that live in the sea.
all vertebrates are chordates because vertebrates are the sub- group of phylum chordates and also it follow one of the important feature of the chordates i.e. presence of notochord whereas all chordates are not vertebrates because some chordates are cephalochordates, urochordates.
There isn't a "popular name" for them. The most familiar chordates are the vertebrates, but not all chordates are vertebrates (tunicates, for example, are chordates).
Chordates are not vertebrates because although some vertebrates are chordates theres many reasons why chordates arent vertebrates.the first reason is because chordates consist of a notochord or a dorsal nerve.
Chordates are animals with vertebrates.
Chordates are a group of animals which include vertebrates (animals having a spinal column), so yes, birds are chordates.