2021 · Q29
Animals which are marine, bilaterally symmetrical, have a coelom and a notochord, but never form a vertebral column are placed under which one of the following groups?
General KnowledgeBiology
- AChordata
- BProtochordata
- CVertebrata
- DMammalia
Explanation
Animals that possess a notochord which never develops into a vertebral column are the protochordates - subphyla Urochordata and Cephalochordata - which are exclusively marine. Chordata is the entire phylum including vertebrates, while Vertebrata and Mammalia by definition possess a vertebral column.