Aspecies of fish is unintentionally introduced into a marine ecosystem. the species has a similar diet to an existing fish species creating competition on for food. according to darwin's theory of evolution by natural selection, which of the following must occur for the existing species to evolve? how do i explain the natural variations in phenotype must be present in the existing species population.

The patient was the driver in a motor vehicle collision, a one-vehicle rollover occurred that was caused due to lack of control. the patient is now bleeding into the abdominal cavity. the physician brings this patient to the operating room to remove the spleen in order to control this patient’s bleeding. the major vessels of the lacerated spleen were carefully dissected, and the spleen was removed in its entirety? cpt code: icd10-cm code: icd10-cm code