yes, all vertebrates have gill slits in the womb but as they develop most species lose the gills. this is an example of comparative embriology which helps scientist discover a common ancestor
Gill pouches are unique to Phylum Agnatha
No
Pharyngeal slits are not gill slits. They are filter-feeding organs in non-vertebrates, and are used to strain matter and food from water.
No, not all vertebrates have tubular nerve cord.
by the gill slits
no.
Regardless of the presumed relationship to tiktaalik, you will find gill slits to be present in all vertebrates. In reptiles, the slits would not persist past the embryonic stage but, the crocodiles' jaws were derived from the gill arches. Look up "Ontogeny recapitulates phylogeny."
A leopard shark has five gill slits on either side of its body. The gill slits are on the sides of the shark's head.
A distinct brain and gill slits used for respiration as opposed to filterfeeding. Granted, those last ones aren´t found outside the fish class, but other vertebrates still develop them in their embryology.
Gill slits in sharks and rays help to funnel water into the gills, which empty into the pharynx and eventually the lungs.
all chordates have notochord, gill slits, postanal tail, and nerve chord.
gill slits
yes.
It would be more appropriate to say that all vertebrate embryos develop pharyngeal gill slits during one of the many phases in their embryonic development. This is because while gills are specifically present in fishes, pharyngeal gill slits are a general chordate feature.