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?

a warm, wet climate will produce the highest rate of weathering. the warmer a climate is, the more types of vegetation it will have and the greater the rate of biological weathering (figure below). this happens because plants and bacteria grow and multiply faster in warmer temperatures.

copper and glass have high electrical conductivity