The centerpiece of U.S. espionage is the CIA, created by the National Security Act of 1947 (50 U.S.C.A. Â§ 402 et seq.) to conduct covert activity. The CIA protects national security interests by spying on foreign governments. The CIA also attempts to recruit foreign agents to work on behalf of U.S. interests.
Most known extremophiles are microbes. The domain Archaea contains renowned examples, but extremophiles are present in numerous and diverse genetic lineages of bacteria and archaeans. Furthermore, it is erroneous to use the term extremophile to encompass all archaeans, as some are mesophilic.ew sub-types of-philes are identified frequently and the sub-category list for extremophiles is always growing. For example, microbial life lives in the liquid asphalt lake, Pitch Lake. Research indicates that extremophiles inhabit the asphalt lake in populations ranging between 10 6 to 10 7 cells/gram.
Living things have evolved into three large clusters of closely related organisms, called domains: Archaea, Bacteria, and Eukaryota. Archaea and Bacteria are small, relatively simple cells surrounded by a membrane and a cell wall, with a circular strand of DNA containing their genes. They are called prokaryotes. Virtually all the life we see each day â including plants and animals â belongs to the third domain, Eukaryota. Eukaryotic cells are more complex than prokaryotes, and the DNA is linear and found within a nucleus. Eukaryotic cells boast their own personal power plants, called mitochondria. These tiny organelles in the cell not only produce chemical energy, but also hold the key to understanding the evolution of the eukaryotic cell.