Which of the following does not occur in an aquatic ecosystem as a result of nutrient loading?
a.
acidification of the water
b.
algae growth as a result of eutrophication
c.
degraded quality of water for human and livestock consumption
d.
improved water habitats for human recreation

Pls me i need this ! each cell has genes activated depending on it's job and what kind of cell it is. it is the presence of that causes the repressor protein to fall off and unblock the gene on the lac operon. if a gene is turned on then it is being an additional circular chromosome found in some bacteria that is used in genetic engineering.