Select the part whose main job is to direct a plant cell's activities by sending instructions to different parts of the cell.

vacuole

chloroplasts

mitochondria

nucleus

Please hurry I’m in a rush

Which would happen if more forests were cut down? a. the nitrogen cycle would be stopped b. nitrogen would be fixed by bacteria more quickly c. the amount of co2 in the atmosphere would increase d. fossil fuels would build up in the soil c the amount of co2 in the atmosphere would increase

The normal shape of an enzyme is as shown in structure a. if the enzyme’s shape changes to that shown in structure b, what are two consequences of this change?

Which of the following is a testable hypotheses?