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.
Metamorphic Rocks. Metamorphic rocks are types of existing rocks that have been altered in form as a result of changes in heat and pressure. In mountainous regions, for example, where rock matter is pressed and altered by plate tectonic activity, metamorphic rocks are very common.here are three basic types of rocks that planet Earth is composed of: igneous, sedimentary, and metamorphic. Follow these simple guidelines to determine the three types of rocks when looking at various types of rocks in the field.