Malaria is caused by a parasite called Plasmodium, which is  transmitted via the bites of infected mosquitoes. In the human  body, the parasites multiply in the liver, and t â¦ hen infect red  blood cells. Usually, people get malaria by being bitten by an  infective female Anopheles mosquito.   *Ninety percent of malaria-related deaths occur in Africa. Malaria is commonly associated with poverty, but is also a cause of poverty.   *Malaria is one of the most common infectious diseases and an enormous public health problem.
metamorphic rock. (petrology). A rock formed from preexisting solid rocks by mineralogical, structural, and chemical changes, in response to extreme changes in temperature, pressure, and shearing stress.
The original rock from which a metamorphic rock formed. A metamorphic rock composed of quartz and transformed from a protolith of quartz sandstone. Metamorphism of a broad region, usually the result of deep burial during an orogeny.A medium-to coarse-grained metamorphic rock that possesses foliation caused by the preferred orientation of large mica flakes. mineral formed by solid-state transitions under metamorphic conditions. Rock that forms when preexisting rock changes into new rock as a result of an increase in pressure and temperature and/or shearing under elevated temperatures; metamorphism occurs without the rock first becoming a melt or a sediment.