Practice question
Question
Which phylum is characterized by animals with a body wall containing ostia and a spongocoel?
Explanation
Members of phylum Porifera (sponges) have a body wall with ostia (tiny pores) leading to the spongocoel, allowing water circulation. This follows from latest NCERT 2026-27 principle explaining the concept clearly for NEET students in simple steps as per rationalized syllabus.
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