Which statement about decomposers is not true?

a. An example of a decomposer is a vulture.

b. Decomposers interact with every trophic level.

c. They help reduce the overall biomass on Earth.

d. They break down dead organisms and return nutrients to the soil.

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.