Thomas Robert Soderstrom Thomas Robert Soderstrom Thomas Robert Soderstrom (9 January 1936 Chicago – 1 September 1987) was an American agrostologist His special field of study was the grass family Gramineae or Poaceae. He was Curator of Grasses at the National Museum of Natural History in Washington, DC for some twenty years. In 1957 Soderstrom graduated from the University of Illinois with a BSc in Biology, and enrolled at the graduate school at Yale University, earning a Master of Science in Biology the following year and a PhD in Botany 1961. He joined the National Museum in 1960 as assistant curator. He became
Nonpathogenic organisms many different types or strains. One strain of a bacterium species can be nonpathogenic and another strain of the same bacterium can be pathogenic. Nonpathogenic organisms Nonpathogenic organisms are those that do not cause disease, harm or death to another organism and is usually used to describe bacteria. It describes a property of a bacterium - its ability to cause disease. Most bacteria are nonpathogenic. It can describe the presence of non-disease causing bacteria that normally reside on the surface of vertebrates and invertebrates as commensals. Some nonpathogenic microorganisms are commensals on and inside the body of animals and are