alleryA pseudocoelom, in which mesoderm is present as scattered pouches in between ectoderm and endoderm, is characteristic of
AAnnelida
BAschelminthes
CArthropoda
DMollusca
Answer & Solution
Correct answer: B. Aschelminthes
1. Coelom classification distinguishes coelomates, pseudocoelomates and acoelomates.
2. Coelomates (annelids, molluscs, arthropods) have a true body cavity lined by mesoderm.
3. Aschelminthes (roundworms like Ascaris) have a pseudocoelom.
4. Platyhelminthes are acoelomate (no body cavity at all).
_Source: syllabus Biology, Ch 4 "Animal Kingdom", §4.1.4_
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