Read the following statements and choose the follwoing option: 1. Phylum chordata are characterised by the absence of a notochord 2. Chordates are bilaterally symmetrical. 3.They possess a post anal tail and a closed circulatory system. 4. Phylum Chordata is divided into three subphyla: Urochordata or Tunicata, Cephalochordata and Vertebrata. 5. Subphyla Urochordata and Cephalochordata are often referred to as protoc

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Animals belonging to phylum Chordata are fundamentally characterised by the presence of a notochord, a dorsal hollow nerve cord and paired pharyngeal gill slits. These are bilaterally symmetrical, triploblastic, coelomate with organ-system level of organisation.,Phylum Chordata is divided into three subphyla: Urochordata or Tunicata, Cephalochordata and Vertebrata. Subphyla Urochordata and Cephalochordata are often referred to as protochordates