A. Cuticle in arthropods
B. Scales in birds
C. Cartilage in mammals
D. Body fluid in earthworms
E. Bones in vertebrates
Correct Answer:
Option B – Scales in birds
A. Cuticle in arthropods
B. Scales in birds
C. Cartilage in mammals
D. Body fluid in earthworms
E. Bones in vertebrates
Correct Answer:
Option B – Scales in birds
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