What are some other organisms, aside from bivalves, that could be used to purify water? No links please

Name the glands associated with human digestive system

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.

The graph shows how much money the south dakota livestock industry earns annually. according to the graph, which industry would experience the greatest financial impact from a loss of pastureland