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What is the leading theory for how complete metamorphosis originated?

A. It evolved from a life stage within the egg.
B. It developed to avoid competition between larvae and adults.
C. It occurred spontaneously in some insect species.
D. It was a gradual adaptation over millions of years.

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Final answer:

Complete metamorphosis in insects involves four distinct stages, enabling specialized adaptations for each stage while reducing competition for resources. The pupal stage is crucial for the profound changes from larvae to adult insects. This strategy promotes efficiency and species diversification.


Explanation:

Complete metamorphosis, also known as holometabolous development, is a process where insects undergo four distinct stages: egg, larva, pupa, and adult. This evolutionarily advantageous mechanism allows functions to be divided between life stages, enabling specific adaptations to suit each stage without affecting the others. The profound changes from larvae to adult insects occur during the pupal stage, where tissues and structures are reorganized into the adult form. This strategy reduces competition for resources between the different life stages, promoting efficiency and species diversification.


Learn more about Evolution of complete metamorphosis in insects here:

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