Dr. Smith has used the same strain of Salmonella for Gram staining in her teaching labs that she has cultured continuously 20 years. In her first year of teaching, a student accidentally ingested the Salmonella strain and became very ill. Twenty years later, a student spilled some Salmonella onto her pen and then put the pen into her mouth. Shockingly the student suffered no ill effects from ingesting the culture of Salmonella. Why did this occur

Ausable water source is one that can be used by humans for drinking or agriculture. identify the water reservoirs as usable or unusable based on their current state. oceans rivers glaciers freshwater lakes groundwater

Development has provided electrically for less money but what may be considered a cause of nuclear power

Match the order of the levels of organization in nature with the correct description. example: atoms are fundamental units of matter= level 1levels- 2,3,4,5,6,7,8.now what levels are these? population consists of organismscells consist of moleculesecosystems consist of communities interacting with there environmentmolecules consist of atomsthe biosphere consist of all ecosystems on earthcommunities consists of populationorganisms consist of cells