How do waves and currents affect beaches overtime?

What substance is the most acidic. lemon juice. tomato juice. sodium hydroxide. water

How do ratio scale and diagrammatic scale work

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.