AYUDAA El ADN, y ARN,  esta constituido por 5 bioelementos químicos que constituyen el 96 % de la materia orgánica ,los mismos que se representan por símbolos . ¿Cuáles son estos bioelementos?
  A)     N __  Ca__ Mg__ O__  C
  B)     C __   P __   Cl__  N __  O
  C)     C  __  N __    Fe __ O __ H 
  D)     C  __  P  __  N __  O __  H​

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

What process creates gametes? a.fertilization b.mitosis c.meiosis

If there is another new infectious disease somewhere in the world, what do you think canadian officials should do