Our response to this parasite provides the most clear-cut and recent example of evolutionary pressure being brought to bear on humans. The sickled cells clog up capillaries, cause great pain and poor distribution of oxygen, leading to death. Carriers of HbS have a selective advantage because they are not as easily killed by malaria before they reach reproductive age. Many fungi infect plants and degrade plant material. For example, Phythophthora infestans was responsible for the potato blight during the early 1800's that caused the Irish potato famine.
Fungi are primarily saprophytes , chemoorganotrophic organisms that live on decaying matter.
Habitats - mostly terrestrial b. Agaricus bisporus - the fruiting body of this fungus is the commercial mushroom. A related fungus, Amanita spp.