Which group of animals is characterized by having three germ layers and lacking a body cavity?

Biology Mcqs for PPSC, FPSC, NTS, and Pakistan government job tests. Select an option below, then read the explanation.

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Subject
Biology Mcqsbiology-mcqs
Published
11 May 2018
Last updated
28 May 2026

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Explanation

Sponges (Porifera) lack true tissues, Annelids (segmented worms) are coelomates, birds (Aves) are also coelomates, while flatworms (Platyhelminthes) are triploblastic but do not possess a body cavity, making them acoelomates.

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