IV. Describe the characteristic features of Chordata (5)
Answers
Answered by
0
Answer:
Animals in the phylum Chordata share four key features: a notochord, a dorsal hollow nerve cord, pharyngeal slits, and a post-anal tail.
is the answer for your question.
Answered by
0
Answer:
Explanation:
- NOTOCHORD : notochord is elastic , solid, ensheathed rod-like structure of vacuolated turgid cells which is present throughout the life or only during early embryonic development, located between nerve cord and digestive tube (alimentary canal). in vertebrates notochord is replaced by a cartilaginous or bony vertebral column in adults.
- DORSAL HOLLOW NERVE CORD : it differentiates into brain and spinal cord. it is present above the notochord.
- PAIRED PHARYNGEAL GILL SLITS : take part in circulation of water for respiration. in higher chordates it occurs in embryonic stages only.
- POST ANAL TAIL : it is present for balancing.
- Along with these features chordates are :
- bilaterally symmetrical
- triploblastic
- coelomate
- organ system level of organisation
- closed circulatory system
Similar questions