Malaria is a tropical, mosquito-borne disease caused by a parasitic protist, plasmodium. the species p. falciparum is particularly deadly, killing about 1 million people each year. there has been considerable debate over the origin of this species. use this recent phylogenetic evidence to determine if p. falciparum originated from another strain of plasmodium in humans, in chimpanzees, or in gorillas. explain your reasoning.