Gut Infection. Gastroeteritis or the stomach flu can be caused by a virus, bacteria or parasites and causes inflammation of the lining of the digestive tract. Besides white poop, this infection can also cause chills, fever, vomiting, achiness, diarrhea or abdominal pain.
Last Updated: Human evolution, the process by which human beings developed on Earth from now-extinct primates. Viewed zoologically, we humans are Homo sapiens, a culture-bearing, upright-walking species that lives on the ground and very likely first evolved in Africa about 315,000 years ago.
This usually results because the species live in similar environments and fill similar ecological roles. The structures in this case are known as analogous structures. The process that brings these traits forward is called convergent evolution. Convergent evolution is natural selection that favors the same type of structure in different ancestors. The similarity between convergent evolution-affected species is called homoplasy, which literally means 'from the same mold or form.' Examples of Convergent Evolution