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.
All chordates have a notochord at some stage in their lives, but in some (such as tunicates) the notochord is lost in the adult, whereas in others (such as the vertebrates) the notochord is present in the embryo, but in later stages is largely replaced and surrounded by the vertebrae, or backbones.