How to understand the difference from active transport and 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

Which geologic feature would most likely be represented by contour lines john far apart from one another? a cliff a hill a plain a valley

Suggest why placing wheels under a heavy box reduces the neccessary force required to push it along at a constant speed.