[Solved] A very common structure for bacteriophage particles is which of the following? A) an icosahedral head and an envelope B) a naked icosahedral head C) a naked helical tail D) an icosahedral head with a helical tail E) a cubic head with a helical tail Karl Marx: A 19th-century philosopher, economist, and political theorist best known for his theories about capitalism and communism. Plant And Equipment: Refers to the tangible assets that are used in the operation of a business or industry including machinery, buildings, and vehicles. Society Control: Mechanisms, processes, and institutions through which societies regulate behavior and maintain order, stability, and cohesion. Centrally Planned Economy: An economic system where the government makes all decisions on the production and distribution of goods and services.