Natural killer cells and cytotoxic (CD8 ) T-cells are great at killing tumor cells or virus infected cells by creating pores in cells with , and then inserting a cytotoxic chemical called to kill the cell.

2%? i tried finding the exact sorry if it's not 100% correct ; -;

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c. establishing proper sleep hygiene

the correct answer is 4) heat and pressure

metamorphic rocks arise from transformation of existing rocks types, in a process called metamorphism. during metamorphism the original rock(prolith) change into metamorphic rock by heating (150-200c) and pressure of more than 1000 bar. the original rock can be sedimentary, igneous, or existing metamorphic rock.