Flying has evolved in all but which of the following groups?

Question

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Flying has not evolved in amphibians. All other groups listed have species that have developed the ability to fly: birds, insects, and some mammals (such as bats) have evolved flight. Some reptiles, like certain extinct dinosaurs and the living draco lizards, have also developed forms of flight or gliding. Amphibians, however, have not evolved flight and are primarily adapted to moist environments and water.

Flying Has Evolved in All but Which of the Following