PLEASE HELP WILL MARK BRAINLIST WHEN I CAN. Why is it important that you keep two variables constant (such as light level and color) while you're testing how a third variable(CO2 level) affects photosynthesis

What pattern of migration do whales follow?

According to this food web which of the following would be considered primary consumers

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.