Nematodes belong to a category of animals called "Ecdysozoa;" which of the following best describes why? a)Nematodes are worms.

b)Nematodes molt their exoskeleton.

c)Nematodes can be parasites.

d)Nematodes lack a head.

According to theories of how life began, how did early organic molecules begin to separate from the outside world? a: specialized enzymes were required b: chains of amino acids created a barrier c: formation of microspheres or vesicles d: rna catalyzed the formation of membranes