The original rock that has undergone metamorphism is called the protolith. Protolith can be any type of rock and sometimes the changes in texture and mineralogy are so dramatic that is difficult to distinguish what the protolith was. 1  Note that diagenesis and weathering are also a changes in form that occur in rocks.
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Answered by The Community. Making the world better, one answer at a time. Effector response is the phenomenon that occurs after the immune system recognizes a foreign organism. A variety of cells and molecules are then recruited to mount an appropriate response to eliminate or neutralize the organism.ecause allosteric regulators do not bind to the same site on the protein as the substrate, changing substrate concentration generally does not alter their effects. Of course there are other types of regulation as well. Active site inhibitors: An inhibitory factor may bind to and block the active site.