Notable sports deaths in 2016. A look at those athletes, coaches and sports personalities we lost in 2016. Keion Carpenter. Keion Carpenter, a former NFL player and Virginia Tech defensive back and special teams standout died Thursday, Dec. 29, 2016 in Miami, the school announced. He was 39 and the cause of death is unknown.
Hemichordates, the phylum of bilateral animals most closely related to chordates, could reveal the evolutionary origins of chordate traits such as the nerve cord, notochord, gill slits and tail.
Notice that invertebrate chordates, such as lancelets and tunicates, are deuterostomes like echinoderms, but as you will learn, they have addi- tional chordate fe atures that echinoderms do not have.