Question

In cephalochordates, the coelom is

• A. Reduced
• B. Absent
• C. Schizocoel
• D. Lined by ectoderm

Answer 1

The correct option is A Reduced

Cephalochordata is a subphylum in the phylum Chordata. Chordates are enterocoelomates.

A) Although enterocoelomates, in cephalochordates coelom is reduced.

B) Coelom is absent in only Porifera, Coelenterata, Cnidaria, and Platyhelminthes.

C) Schizocoel is formed by splitting of mesodermal mass in embryonic development and is present only in Annelida, Arthropoda, and Mollusca.

D) No coelom is lined by ectoderm.

So, the correct answer is 'Reduced'.