What theory was Huygens writing about?

Most scientific questions are based on opinions. hypotheses. observations. experimental data.

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

The means by which a cell transports large molecules out of the cell is called