Strain - A genetic variant or specific subtype of a microorganism, such as a virus or bacteria.⏎
Yeast - A broad group of microscopic fungi that includes harmless forms of yeast used in baking and alcoholic fermentation as well as pathogenic species that can cause disease. ⏎
Virus - An infectious agent that is only capable of replicating itself inside the living cells of other organisms.⏎
Suburbanization - The process of land conversion and development around the periphery of major cities.⏎
Sperm Cell - The male gamete, or sex cell, which carries the hereditary material of the male parent and unites with the female egg cell during sexual reproduction.⏎