Well, no they don't... There's a group of chordates called Agnatha which basically contains all the jawless chordates. And there are obviously limbless chordates present, the fishes and the snakes being the most well-known of the examples...
Myxini (hagfishes) are chordates and craniates. they have a cartillagenous skull but no vertebra or jaws.
E, limbs (apex)
Yes, chordates typically have a coelom. The coelom is a body cavity lined with mesoderm that surrounds the internal organs, providing space for organ movement and protection. It is considered an important characteristic of chordates, although not all chordates have a well-developed coelom.
Chordates all possess a notochord (dorsal supporting rod), gill slits, and a dorsal nerve cord some time in their life cycles.
Ants and all other insects are non-chordates. Insects belong to the subphylum arthropoda. Animals that are vertebrates are considered to be chordates.
Myxini (hagfishes) are chordates and craniates. they have a cartillagenous skull but no vertebra or jaws.
Not all chordates have fins. While many aquatic chordates, such as fish, possess fins for swimming, other groups, like mammals (including humans) and birds, do not have fins. Instead, these animals have evolved different structures for locomotion, such as limbs for walking or wings for flying. Thus, fins are characteristic of certain chordate lineages but not a universal feature of all chordates.
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.
E, limbs (apex)
The cladogram shows that the traits of jaws and limbs have evolved independently in these species. There is no clear correlation between the evolution of jaw traits and limb traits in this specific scenario. This suggests that these traits may have adapted to specific environmental pressures and constraints in a lineage-specific manner.
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).
All chordates are deuterostomes, meaning that in all chordates, the anus develops first during embryological development. All chordates are bilaterally symmetric. Most chordates have a complete digestive tract, and a body cavity. Note: not all chordates have these features, but it is believed that their absence in some chordates is secondary. All chordates are of course animals and eukaryotes.
All fish are chordates. Chordates are vertebrates that have a hollow dorsal nerve called a notochord. They also have a central nervous system and gill clefts.
a backbone
Yes, chordates typically have a coelom. The coelom is a body cavity lined with mesoderm that surrounds the internal organs, providing space for organ movement and protection. It is considered an important characteristic of chordates, although not all chordates have a well-developed coelom.
At some point in all chordates' lives, they have a notochord, a nerve chord, gill slits and a tail. Some chordates are more complex though.
All Chordates have(in part of their life or another) A Notochord A hollow dorsal nerve cord A post-anal tail