Where does the sinoatrial node send an impulse after it initiates the electrical signal?

Here's one way to follow the scientific method. place the missing steps in the correct position in the process.

Now it's your turn to investigate human impact around the world. grab your virtual lab coat and put on your environmental science hat. you will be taking a trip around the globe to explore three locations. at each location, you will investigate the cause and effect relationships of deforestation, desertification, and urbanization. you will also gather evidence of how these factors have impacted the environment over time

What happens when the cell copies its chromosomes