RE-NEET2026Zoology-Animal Kingdom
RE-NEET 2026 Zoology Porifera MCQ Question
Type: MCQ-conceptual-Easy-Class 11
Sponges exchange O₂ with CO₂ by
A
moist cuticle
B
tracheal tubes
C
gills
D
simple diffusion over their entire body surfaces
Correct Answer
Option D
Detailed Explanation
Sponges lack specialized respiratory structures and rely on simple diffusion across their body surfaces for gas exchange.
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