because is not an animal whose nerve cord is surroundeda by backbone.
Rajabu Obede
The lancelets, also known as amphioxus, are a group of 32 species of marine creatures in shallow waters. Despite giving good insight into the origination of vertebrate life, they are not themselves vertebrates, because their 'spine' is not a true spine.
The lancelet is an invertebrate.
A lancelet is a filter feeder with no brain, eyes, or heart. A sea squirt is an example of a lancelet.
Try looking up sea squirts (Tunicata), acorn worms (Enteropneusta) and Pterobranchia. Oh, and Branchiostoma of course, the lancelet. And in some ways hagfish aren´t considered real vertebrates either.
i think yes
yes it is living..
A vertebrate, since sloths are mammals and all mammals are vertebrates.
Phylum Chordata
living
lancelet branchiostoma
like other cordates except urocortates, lancelet have closed-circulatory system.
An amphioxus is a lancelet, particularly of the genus Branchiostoma.