Why can organs be members of more than one organ system?

Give the biological term for: structures that display characteristics of living organisms only within living cells

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

At which location in earth’s interior does the top density continue to increase as thickness decreases?