What are they two major ways earth moves?

Assume that a student is given two different models of bacteria, with one model consisting of big bacteria and the other consisting of small bacteria. how can the student demonstate the theory of endosymbiosis using the models

Indica el nombre y la fucion de los vasos sanguineos que entran y salen de los riñones

What term describes a doctor who becomes a specialist by meeting standards beyond those of getting a license and passing a test in the specialty area?