Sargassum muticum (Japweed) is a species of brown algae in the family Sargassaceae. They are associated with freshwater habitat. They are native to Japan, Russia, North Korea, South Korea, and China.
Definition: number of homologous sets of chromosomes in the nucleus or primary chromosome-containing compartment of the cell, each set essentially coding for all the biological traits of the organism.
Definition: A group of species that exploit the same food resources, and/or use the same feeding or foraging methods. http://en.wikipedia.org/wiki/Guild_(ecology)
