Las mutaciones son alteraciones físicas ,químicas y biológicas que afectan  al nuevo ser vivo o individuo, se produce por:      A) agentes químicos 
     B) cambios en la estructura química del ADN                    
     C) alteración del número de  cromosomas
     D) alteración de la información genética​

Which element is found in both dna and proteins

The buildup of sediments where a river empties into a slow-moving or nonmoving body of water is known as a/an

The sketch shows a rynchosaur, an extinct animal that is known only from fossils. there has been much debate about the classification of these creatures. some scientists suggest that they belong with primitive amphibians, and some think they are related to snakes and lizards.the data equally support both cases. which statement best explains how to draw a cladogram that includes the rynchosaur? draw the cladogram for amphibians. draw the cladogram for reptiles. draw two cladograms, both showing the traits, and leave it as a hypothesis. draw two cladograms, both showing the traits, and have scientists vote