Science!
which of the following contributes to global warming
ozone hole
acid rain
greenhouse gases
tropospheric ozone

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.

One student group hypothesized that the dry baker's yeast must be alive.the temperature change, odor, and bubble foation, they said, indicated whych characteristic of life

A. describe the scientific method, using pasteur's swan-necked flask experiment as an example.