Which of the Following Does NOT Have an Exoskeleton

Question

Which of the following does NOT have an exoskeleton?  
A) lobsters
B) spiders
C) insects
D) earthworms
E) centipedes

Accepted Answer

Earthworms do not have an exoskeleton as they belong to the phylum Annelida, which are segmented worms and have a hydrostatic skeleton. The other options - lobsters, spiders, insects, and centipedes all have exoskeletons.