In the food web the amount of matter a) remains constant. b) remains unstable. c) is all converted to heat. d) increases with each trophic level.

What statements describe a host organism?

During the process of blank and molecules such as a glucose must use a protein channel to cross through a cell membrane

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.