Therefore they are chordates but not vertebrates. Non-chordates. Cladistically (phylogenetically), vertebrates – chordates with the notochord replaced by a vertebral column during development – are considered to be a subgroup of the clade Craniata, which consists of chordates with a skull. Justify this statement? Give reason.. All vertebrates are therefore also chordates. Answer to: All vertebrates are chordates but all chordates are not vertebrates. All vertebrates are chordates but all chordates are not vertebrates. All vertebrates also have notochord during embryonic life, which is later replaced by vertebral column. All vertebrates are chordates, but not all chordates are vertebrates. In sub-phylum Vertebrata, the notochord present in embryos gets replaced by a cartilaginous or bony vertebral column in adults. So all vertebrates are chordates but all chordates are not vertebrates. There are invertebrates that possess a notochord during some point in their lives and hence, are classified as chordates. The characteristic features of the phylum, Chordata, include the presence of a notochord and paired pharyngeal gill slits. Scientists do not believe that the appearance of the vertebral column is enough justification for removing the vertebrates from Chordata, hence Vertebrata remains within Chordata. Chordates are animals which possess, or at some point in their life cycle did possess a notochord. Justify the statement. Mar 16,2020 - All vertebrates are chordates but all chordates are not vertebrates . Ask questions, doubts, problems and we will help you. Vertebrates are further differentiated from chordates by their vertebral column, which forms when their notochord develops into the column of bony vertebrae separated by discs. The main difference between chordates and vertebrates is that some chordates do not have a vertebral column whereas all vertebrates have a vertebral column. In sub-phylum Vertebrata, the notochord present in embryos gets replaced by a cartilaginous or bony vertebral column in adults. Justify the statement. Essentially there is no difference as vertebrates are chordates. | EduRev Class 11 Question is disucussed on EduRev Study Group by … In case of other lower vertebrates (hemichordata, urochordata) notocord is present. All vertebrates are chordates because chordates with vertebral column is called vertebrates . Non-chordates are animals without a notochord – the rod-like elastic structure that supports the body. Thus all vertebrates are chordates but not all chordates are vertebrates. Thus all vertebrates are chordates but all Chordates are not vertebrates. Because of all the vertebrate have a nerve chord which is main character of chordate but all the chordate have not vertebral column which is main character of vertebrates… All vertebrates are chordates : This is so because they possess three basic chordates features as: (a) All chordates possess a notochord. Why? Other chordates that are not within Vertebrata lacks a vertebral column. But there are some chordates without vertebral column. Thus, it can be said that all vertebrates are chordates but all chordates are not vertebrates. All vertebrates are chordates but all chordates are not vertebrates . In vertebrates notochord and nerve cord are present only in embryonic stage but it is replaced by cartilaginous and bony vertebral column and brain and spinal chord in their adult stage. Vertebrates have a vertebrae or a back bone. As chordates, vertebrates have the same common features: a notochord, a dorsal hollow nerve cord, pharyngeal slits, and a post-anal tail. All chordates possess notochord in some period of their development. The characteristic features of the phylum Chordata include the presence of a notochord and paired pharyngeal gill slits. therefore all vertebrates are chordates but some chordates like Urochordates and Cephalochordata do not possess vertebral column and hence they are not vertebrates. (b) All chordates have a dorsal, hollow nerve cord.