Evolutionarily, the jaws of vertebrates developed from A) the circular mouth of lampreys. B) the last pharyngeal arch of jawless fishes. C) the third pharyngeal arch of jawless fishes. D) the operculum. E) the claspers.

What contributes to the high level of biodiversity found in wetlands? a. the large amount of available organic matter to organisms that are food for larger organisms b. the amount of available water for organism use c. the high nutrient availability d. all of the above select the best answer from the choices provided a b c d