Complex sentence: In biology, a nymph is the immature form of some insects, which undergoes incomplete metamorphosis (hemimetabolism) before reaching its adult stage; unlike a typical larva, a nymph's overall form already resembles that of the adult.
Split into simpler sentences: In biology, a nymph is the immature form of some invertebrates, particularly insects, which undergoes incomplete metamorphosis (hemimetabolism) before reaching its adult stage. Unlike a typical larva, a nymph's overall form already resembles that of the adult.