Poaceae Poaceae Poaceae () or Gramineae is a large and nearly ubiquitous family of monocotyledonous flowering plants known as grasses, commonly referred to collectively as grass. Poaceae includes the cereal grasses, bamboos and the grasses of natural grassland and cultivated lawns and pasture. Grasses have stems that are hollow except at the nodes and narrow alternate leaves borne in two ranks. The lower part of each leaf encloses the stem, forming a leaf-sheath. With around 780 genera and around 12,000 species, Poaceae are the fifth-largest , following the Asteraceae, Orchidaceae, Fabaceae and Rubiaceae. Grasslands such as savannah and prairie where grasses
History of model organisms had been until then invisibly killing tobacco plants across England. It was Stanley who would accomplish this task first by changing the pH to one a more acidic one. In doing so he was able to conclude that the virus was either a protein or closely related to one, thus benefiting experimental research. There are very important reasons why these new, much smaller organisms such as the Tobacco Mosaic Virus and "E. coli" made their way into the molecular biologists’ laboratories. Organisms like "Drosophila" and "Tribolium" were much too large and too complex for the simple quantitative experiments that men