Nutrition and Growth of Bacteria (page 4) (This chapter has 6 pages) Â© Kenneth Todar, PhD Physical and Environmental Requirements for Microbial Growth The procaryotes exist in nature under an enormous range of physical conditions such as O2 concentration, Hydrogen ion concentration (pH) and temperature.
In a double replacement reaction parts of two compounds switch places to form two new compounds. Two reactants yield two products. For example when silver nitrate combines with sodium chloride, two new compounds--silver chloride and sodium nitrate are formed because the sodium and silver switched places.
Chemical Reaction: When the atoms of one substance mix with the atoms of another substance and changes take place, you then have a chemical reaction. Decomposition Reaction: When a compound breaks down into smaller compounds or singular elements by imputing an energy form like light, electricity or heat, this is a decomposition reaction.