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.
Yes, a dolphin is a chordate. Chordates are animals that possess a notochord, a dorsal hollow nerve cord, pharyngeal slits, and a post-anal tail at some point in their life cycle, all of which dolphins have.
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
Four characteristics of chordates include having a notochord (flexible rod for support), a dorsal hollow nerve cord (nerve tube along the back), pharyngeal slits or pouches (openings in the throat area), and a post-anal tail (tail that extends beyond the anus at some point in development).
No, if an embryo's egg is cracked, it is unlikely to survive as it will be unable to develop properly or receive the necessary nutrients and protection. The eggshell is essential for maintaining the embryo's environment and supporting its growth.