The larvae of some insects are merely small versions of the adult, whereas the larvae of other insects look completely different from adults, eat different foods, and may live in different habitats. Which of the following is most directly involved in the evolution of these variations in metamorphosis?
A) artificial selection of sexually immature forms of insects
B) changes in the homeobox genes governing early development
C) the evolution of meiosis
D) the development of an oxidizing atmosphere on Earth
E) the origin of a brain

Question

Quizplus · Accepted Answer

Changes in homeobox genes are directly involved in the evolution of different strategies of metamorphosis in insects. These genes regulate the development of body structures during embryonic and larval stages. Mutations in these genes can lead to changes in the timing, extent, or direction of development, resulting in variations in the morphology, behavior, and life history of insects. Some insects may have lost or gained certain developmental pathways, allowing them to adapt to different environments or exploit different resources during their life cycle. Therefore, changes in the homeobox genes are a major factor in the diversification of metamorphosis in insects.

The Larvae of Some Insects Are Merely Small Versions of the Adult