NEET · Biology · STD 11 - 4. Animal kingdom
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
- B B and E only
- C C and D only
- D B and D only
Answer & Solution
Correct Answer
(B) B and E only
Step-by-step Solution
Detailed explanation
(B) B and E only
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.
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.
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