Nematodes and arthropods look very different from one another but they share one key characteristic that differentiates them from most other animals. That characteristic is the:

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Both nematodes and arthropods have a cuticle that molts during growth. This is a key characteristic that they share, and sets them apart from most other animals. The other options - head, pseudocoelom, and antennae - may be present in one or both groups, but don't differentiate them from other animals.

Nematodes and Arthropods Look Very Different from One Another but They