試題詳解

35. Which statement best describes the current scientific view of birds?
(A) a group of feathered, endothermic dinosaurs
(B) a group of feathered, ectothermic lizards that lack teeth
(C) a group of flying, endothermic reptiles that have lost teeth, the amniotic. egg, and other beavy body features as an adaptation for flight
(D) a group of flying mammals that are derived from monotremes, which also lay amniotic eggs