Q167 / 180 · NEET 2026 (Cancelled) · Zoology

Select the incorrect statements from the following :
A. Digestive system in Platyhelminthes is incomplete.
B. Bilateral symmetry is a characteristic feature of adult Echinoderms.
C. Pseudocoelom is possessed by Aschelminthes.
D. Notochord is persistent throughout life in the class Chondrichthyes.
E. Members of class Reptilia maintain a constant body temperature.
Choose the answer from the options given below :

  • A
    A and C only
  • Correct answer
    B
    B and E only
  • C
    C and D only
  • D
    B and D only

Solution

Statement A is correct. Platyhelminthes have an incomplete digestive system with a single opening that serves as both mouth and anus.

Statement B is incorrect. Adult echinoderms exhibit radial symmetry, whereas their larvae exhibit bilateral symmetry.

Statement C is correct. Aschelminthes possess a pseudocoelom, where the body cavity is not lined by mesoderm but is present as scattered pouches.

Statement D is correct. In members of the class Chondrichthyes, the notochord is persistent throughout life.

Statement E is incorrect. Members of the class Reptilia are poikilotherms (cold-blooded) and cannot maintain a constant body temperature.

Therefore, the incorrect statements are B and E.

Answer: B and E only

Hence, the correct answer is option: 'B'.

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