DEFINITIONS & KEY POINTS FOR OBJECTIVES OF HEMICHORDATA & CHORDATES
| TERMS | DEFINITIONS |
| Tunicates | Tunicates and a small group of fishlike cephalochordates lack a vertebral column.
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| Deutrosomes | The animals in which blastopore are changed into anus and mouth is arised as a separate opening is called deutrostomes.
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| Paedomorphois | The development of sexual maturity in the larval body form is paedomorphsis. |