MCQ
Exoskeleton of arthropods is composed of :
- ACellulose
- ✓Chitin
- CGlucosamine
- DCutin
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$I.$ Water ...$A\%$ $II.$ Urea ...$B\%$ $III.$ Uric acid ...$C\%$ $IV.$ Salt ...$D\%$
Choose the right options for $A , B , C$ and $D$ from given options
$R$ : Echinoderms have secondarily adapted to radial symmetry.