Topic: Basis of animal classification· Diversity in Living World

While trying to find out the characteristic of a newly found animal, a researcher did the histology of adult animal and observed a cavity with presence of mesodermal tissue towards the body wall but no mesodermal tissue was observed towards the alime…

While trying to find out the characteristic of a newly found animal, a researcher did the histology of adult animal and observed a cavity with presence of mesodermal tissue towards the body wall but no mesodermal tissue was observed towards the alimentary canal. What could be the possible coelome of that animal ?

1. Acoelomate

2. Pseudocoelomate

3. Schizocoelomate

4. Spongocoelomate

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Answer: 2. Pseudocoelomate

Key idea: A pseudocoelom is a body cavity only partly lined by mesoderm.

Here mesoderm is present towards the body wall but absent next to the gut, so the cavity is a pseudocoelom, as in roundworms. An acoelomate has no cavity, and a true coelom has mesoderm on both sides. Schizocoelomate describes how the coelom forms, and spongocoelomate is not a coelom type.

Doubtly AI · 30 Oct 2026 AI-generated · not yet verified Report

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While trying to find out the characteristic of a newly found animal, a researcher did the histology of adult animal and observed a cavity with presence of mesodermal tissue towards the body wall but no mesodermal tissue was observed towards the alime…

1 answer

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