What must be true for natural selection to happen? O A. All organisms must have the same genotype.
O B. There must be competition for resources.
O C. The population must be below carrying capacity.
O D. There cannot be any predators.

Ateam from new york presbyterian hospital is conducting a study about a recent increase in cases involving both excess sweating and kidney stones. what would the team need before it draws a conclusion about the cases? medications that are specifically designed to treat the sickness machines that are built to process blood and reduce symptoms until patients are healthy again data that profile the various patients who report these symptoms proof that the excess sweating is related to the excessive kidney stones