alleryWhich set of phyla consists entirely of acoelomate animals?
AAnnelida, Arthropoda and Mollusca
BPorifera, Cnidaria and Platyhelminthes
CAschelminthes, Annelida and Mollusca
DArthropoda, Echinodermata and Annelida
Answer & Solution
Correct answer: B. Porifera, Cnidaria and Platyhelminthes
1. Acoelomates lack a body cavity entirely.
2. Porifera, Cnidaria and Platyhelminthes are the acoelomate phyla.
3. Rule out Annelida-onward groups: from Annelida they are eucoelomate.
4. Aschelminthes is pseudocoelomate, so any set containing it is wrong.
_Source: Balbharati (Maharashtra Board) Class 10 Science & Technology Part 2, Ch 6 "Animal Classification", p.75_
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