Humus is made of ? (Select all that apply.) organic material
bedrock
mineral deposits
inorganic material
insects
microorganisms

Which term describes the number of waves that pass a given point in a given time? crest frequency trough wavelength

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

What type of competition exsist between two species. turtles and fish