98 Texas A&M University â¦ [51st in U.S.]. (College Station, TX, USA). As the stateâs first public institution of higher learning, Texas A&M University has strategically grown into one of the nationâs largest and most comprehensive Tier One research universities.
Chordata-Vertebrates, Tunicates, Lancelets. At some point, all of the organisms in this phylum have a structure called a notochord. A notochord is a flexible rod-like cord of cells that provides the main support for the organism's body during its embryonic stage.
Craniates, like all chordates, develop a notochord that is present in hagfishes and lampreys but which disappears in most vertebrates where it is replaced by the vertebral column. All craniates have an internal skeleton, also called an endoskeleton.The endoskeleton is made up of either cartilage or calcified bone.raniates, like all chordates, develop a notochord that is present in hagfishes and lampreys but which disappears in most vertebrates where it is replaced by the vertebral column. All craniates have an internal skeleton, also called an endoskeleton.