What does the chemical formula CaCl2 show about the compound it represents? O It is made up of one element.
O It is made up of two.
O It is made up of three elements.
O It is made up of four elements.

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 diagram shows the layers of earth. convection currents in which region influence the movement of tectonic plates

Anormal strand of dna is shown below, followed by the same strand of dna after mutations have occurred.