Bacteria live in the roots of plants and the plants to get nutrients. what type ofsymbiotic relationship is this? a. mutualismb. parasitismc. commensalismd. none of the above

Which best describes the digestive system of arthropods? a incomplete, two openings b complete, one opening c two-way, one opening d one-way, two openings

Why did the federal government end its support of yucca mountain as a site for long-term storage of nuclear water

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.