Surface runoff from urban areas can contain high levels of pollutants. The pollutants in the surface runoff that flows into the ocean A creates food sources for native marine fish. B helps native marine fish adapt to freshwater. C poisons and kills off many native marine fish. D carries many native marine fish to lakes.

the dna molecules have a negative charge because of the phosphate groups in their sugar-phosphate backbone, so they start moving through the matrix of the gel towards the positive pole. power is turned on and dna fragments migrate through gel (towards the positive electrode).

explanation:

just finished the test, the answer is d, greg is the least cost-effective because he charges the most for the project

i believe your answer would be c.. : )