notochord
the thing that helps you live
Because it does not have a "back bone".
No, it is an invertebrate or non-chordate
Yes, all chordates have a nerve chord running down their back and an earthworm has a nerve chord running down it's back therefore it is a chordate
The notochord of a vertebrate differs from that of an invertebrate because a vertebrates eventually turns into a back bone. Invertebrates just disappears.
Neural tube.
A dolphin i AA cordate because it has back bones and lots of other bones that make it a chordate
Down the back is a structure called the Notochord. The structure is cartilaginous and over time turns in to bone. You still have some of this cartilage when your a child, but as you grow up it is all replaced with bone. Either side of the Notochord are somite that can migrate to make other tissues too.
Yes, a butterfly has no backbone because it is an insect. All insects do not have a back bone . a butterfly has an exoskeleton which means its on the outside and most exoskeletons don't have a back bone except a turtle.Read more: Is_a_Butterfly_an_Invertebrate
it develops them by ripping and when they 'knit' themselves back together they are stronger
No, if you put it back in its nest the mother will kick it out and it will die overnight.
No, an earthworm is not a chordate because it has a nerve cord that does not run down the back.