<prompt> Congenitally missing teeth are the result of failure in which stage of development?InitiationMorphodifferentiationAppositionCalcification  <response>: Initiation and proliferation are the only possibilities for congenitally absent teeth, the bud and cap stages, respectively. In the histodifferentiation stage, the teeth are present; failure in this stage results in structural abnormalities of the enamel and dentin. Failure in the morphodifferentiation stage results in size and shape abnormalities. 