Which of the following was an early realization that gave rise to darwin's theory of natural selection? a. most organisms share the same habitat. b. the earth is younger than previously thought. c. organisms do not appear to be closely related. d. the earth and its organisms have changed through time.

Which of the following is an example of a tissue on the digestive system a.the stomach b.smooth muscle that lines the stomach c.nerve cells in the stomach d. enzyme molecules in the stomach

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 type of neuroglia is found outside of the brain?