Killer t cells destroy all of the following except a) tumor cells. b) white blood cells. c) transplanted tissues. d) virus infected cells.

affects the water bodies: excessive use of fertilizers causes eutrophication. the fertilizers which are used on plants affect the quality of land on which it is used, further causing erosion of soil. the fertilizers used on plants contain harmful chemical fumes which affect the environment.

i think the answer is b.