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.
Â· just now. Report Abuse. Metamorphic rocks are rocks that have undergone metamorphism, or change in form.. What this means is that a pre-existing rock type, the protolith, is exposed to heat greater than 150 C. The protolith can be igneous or sedimentary rock, or just some older metamorhpic rock.eport Abuse. Metamorphic rock is the result of the transformation of a pre-existing rock type, the protolith, in a process called metamorphism, which means change in form.