What are the reasons that you could think of for the arthropods

animal-kingdom
cbse

#1

What are the reasons that you could think of for the arthropods to constitute the largest group of animal kingdom?


#2

Arthropods constitute the longest group of animal kingdom due to following reasons
(i) Arthropods have a chitinous exoskeleton, that gives protection.
(ii) A single ootheca contains a number of developing eggs inside.