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What is the notochord replaced by in the adult members of Vertebrata subphylum?

Options

  1. ACartilaginous
  2. BBony
  3. CMuscular
  4. DNone of the above

Correct answer

B. Bony

Step-by-step solution

The members of subphylum Vertebrata possess notochord during the embryonic period. The notochord is replaced by a cartilaginous or bony vertebral column in the adult. Vertebrates have a ventral muscular heart with two, three or four chambers, kidneys for excretion and osmoregulation and paired appendages which may be fins or limbs.All living members of the class Cyclostomata are ectoparasites on some fishes.Cyclostomes have an elongated body bearing 6-15 pairs of gill slits for respiration.Cyclostomes have a suckin

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