Explain how natural killer (NK) cells are able to determine which cells have been invaded by pathogens, and once detected how do the NK cells destroy the infected cells. g

Nk cells can respond to infection either directly or indirectly . They respond directly or indirectly. They respond directly by recognizing virus infected cells and indirectly by interacting with dendlitic cells.

the "power" of a lens is its resolution power, or its ability to distinguish between to closely located points. with the low power lens, it is likely you will see the rough form of the hay and maybe some movement of dots around the hay. however, when observed with the high power lens, the detailed features of the hay become visible and the microbes being grown are more clearly visible.

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