The cells of the human body must have a lower sodium ion concentration and a higher potassium ion concentration than the blood carried by the circulatory system. What cellular mechanisms allow human body cells to maintain these
concentrations? Do these examples demonstrate active or passive transport?

Sampling lake water for microscopic organisms is not as easy as it sounds when you want to both count and identify species. in a given water sample, your bacteria of choice can be rare or difficult to culture, particularly given the mixture of bacteria in a biofilm. which of the following culture media would be best for growing fecal coliforms when they are relatively less abundant than other bacteria in the lake? anaerobic culture medium enrichment culture medium complex culture medium basic culture medium

The bacteria found in soil is usually harmful and measures are taken to remove any traces of microorganisms. true or false

What best describes the dropping height of a ball that bounces back up to a height of 45 cm