Biology
NULL
Medium
Question
The system well developed in the acoelomate is ___________?
A
Excretory system
B
Nervous system
C
Transport system
D
All of these
✓ Official correct answer
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A
Excretory system
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B
Nervous system
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C
Transport system
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D
All of these
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Explanation
In acoelomates, such as flatworms, the excretory and nervous systems are relatively well developed, while a true transport (circulatory) system is notably absent, with nutrient and gas exchange instead occurring by diffusion across their flattened bodies.