GCEBiologyGrowth and Development2019

Metamorphosis in insects such as the housefly (Musca domestica) is described as holometabolous because it involves

Atwo stages: egg and adult only
Bthree stages: egg, nymph, and adult with gradual change
Cfour stages: egg, larva, pupa, and adult with complete transformationCORRECT
Dcontinuous growth without any distinct stages
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Why the answer is C, and why the others tempt you.
Holometabolous (complete) metamorphosis involves four distinct stages: egg, larva (maggot in housefly), pupa, and adult (imago). The larval and adult stages are morphologically very different, with the pupa being the transformative stage. Hemimetabolous insects like grasshoppers undergo incomplete metamorphosis with three stages (egg, nymph, adult), making option B incorrect for the housefly.
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