or region into the life-form classes according to Raunkiaer's 

 classification (q. v.). 



Biologies 



Biological products such as vaccines, serums, etc. 



Bioluminescence 



Emission of light by living organisms such as fireflies, 

 jelly fish, etc., popularly "phosphorescence." 



Biomass 



The total quantity at a given time of living organisms of 

 one or more species per unit of space (species biomass), or of 

 all the species in a community (community biomass). cf. 

 Yield, Productivity , Standing crop. 



Biome 



A major biotic community composed of all the plants and 

 animals and communities, including the successional stages 

 of an area; the communities possess certain similarities in 

 physiognomy and in environmental conditions. Similar to 

 Formation (q. v.), e.g., the North American grassland, cf. 

 Biotic province, Biome-type. 



Biome-type 



A group of similar Biomes, e. g., the temperate deciduous 

 biome-type which includes the deciduous forests of eastern 

 North America, China and Manchuria, and Europe. 



Biometry 



The application of the science of statistics to the study 

 of organisms. 



Bionomics 



The study of organisms in relation to each other and to 

 the environment, cf. Ecology. 



Biorealm 



See Biome-type. 



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