Which pair of features is characteristic of phylum Aschelminthes?
A{'text': 'Acoelomate, closed circulatory system', 'label': 'A'}
B{'text': 'Coelomate, incomplete alimentary canal', 'label': 'B'}
C{'text': 'Pseudocoelomate, complete alimentary canal', 'label': 'C'}
D{'text': 'Diploblastic, radial symmetry', 'label': 'D'}
Answer & Solution
Correct answer: C. {'text': 'Pseudocoelomate, complete alimentary canal', 'label': 'C'}
1. Aschelminthes (roundworms) are triploblastic and bilaterally symmetrical.
2. Their body cavity is a pseudocoelom, not a true coelom.
3. The alimentary canal is complete: mouth at one end and anus at the other.
4. Sexes are separate (dioecious) and Ascaris is a classic example.
_Source: NCERT Class 11 Biology, Ch 4 "Animal Kingdom", §4.2.5_
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