alleryAn animal is called a true coelomate when its body cavity is:
Aabsent completely
Blined by mesoderm on both sides
Cpresent only between ectoderm and endoderm
Dfilled entirely with solid mesoderm
Answer & Solution
Correct answer: B. lined by mesoderm on both sides
A true coelom, or eucoelom, is a body cavity lined by mesoderm on both sides.
If the cavity is absent the animal is acoelomate, and if mesoderm lines only one side it is pseudocoelomate.
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