Differences between Agnatha and Gnathostomata
S.N. Agnatha Gnathostomata 1. Mouth is circular without jaws. Mouth is provided with jaws. 2. Paired appendages are lacking. Paired appendages are present, may be […]
notochord
General characteristic features of phylum Chordata
Chordates are bilaterally symmetrical, deuterostomial, eucoelomate eumetozoans. A flexible but firm supporting skeletal rod, called notochord is present in the embryo or throughout life. From […]