question_answer 32)

  Which one is the most striking or (common) character of the vertebrates? (a) Presence of notochord                                           (b) Presence of triploblastic condition (c) Presence of gill pouches                                         (d) Presence of coelom

Answer:

  (d) Vertebrates are the most advanced group of animals and is also known as craniate. The characteristic features of vertebrate is presence of notochord. It is a long rod-like support structure that runs along back of the animal separating the nervous tissue from gut. The other feature of vertebrate are They have a true vertebral column and internal skeleton which allows completely different distribution of muscle attachment points that help in movement. Their body is bilaterally symmetrical, triploblastic, coelomic and segmented. In these animals, complex differentiation of body tissues and organs is present. They are grouped in five classes 1. Pisces                                2. Amphibia                       3. Reptilia                             4. Aves                5. Mammalia