A 1:10 dilution was made of microbial broth and then was diluted 1:100. 20 colonies were then counted. How many microbes/mL were present in undiluted broth?

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

Eutrophication caused by human nutrient pollution.

How does the human body lever work?