Teaching BPSC बिहार माध्यमिक TGT (9 to 10) शिक्षक भर्ती 4.0 Mock Test Biology Diversity in The Living World Animal Kingdom
Exoskeleton of arthropods is made up of ________.
1
Protein
2
Chitin
3
Muscle
4
More than one of the above
5
None of the above