Question

Write Four distinguishing characters of Sub phylum- vertebrata/Craniata...​

Answer 1

Answer:

• Living Endoskeleton. The endoskeleton of vertebrates, as in the echinoderms, is an internal supportive structure and framework for the body. ...
• Pharynx and Efficient Respiration. ...
• New Head and Advanced Nervous System. ...
• Paired Limbs. ...
• Garstang's Hypothesis of Chordate Larval Evolution. ...
• Position of Amphioxus.

Answer 2

Distinguishing characters of Sub phylum-Vertebrata/Craniata are as follows:-

• In these animals, notochord is replaced by vertebral column.
• In these animals, head is well developed.
• Brain is protected by cranium.
• Endoskeleton is either cartilaginous or bony.