Question

Which one is not characteristic feature of subphylum vertebrata?

• A. Dorsal tubular nerve chord
• B. Ventral muscular heart
• C. Notochord in adult
• D. Kidneys
• E. Lateral appendages

Answer 1

The correct option is C Notochord in adult

Vertebrates are also known as euchordates. They are advanced chordates. Characteristics of phylum Vertebrata are:

• The notochord is present only in embryonic stages and in adults, it is replaced by vertebral column or backbone.
• The heart is centrally placed and is usually with a hepatic portal system.
  
• The excretory organs are paired kidneys.
• Skin is covered by a protective skeleton which consists of lateral appendages, hair, feathers, etc.

Hence, notochord in an adult is not a characteristic feature of subphylum Vertebrata.

• So, the correct answer is 'Notochord in adult'.