Diana has just completed a reaction that had a chemical change. Which two changes could be evidence of this change?
O color and odor
O color and shape
O odor and density
O shape and density

How would you take a difficult subject matter - such as poaching, deforestation, or climate change and communicate it in a kid-friendly way

The greenhouse effect a. something that has occurred for millions of years b. an unnatural phenomenon caused by humans that maintains earths temperature range. c. the results of the differences in the angle of the suns rays d. an unnatural phenomenon that causes heat energy to be radiated back into the atmosphere

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.