Types of Microorganisms. 1. Bacteria. Bacteria are unicellular organisms, about few microns in size (1 micron (Âµm) = 1/1,000 of a millimetre), consisting of DNA, cytoplasm, structures needed for metabolism and reproduction, cell membrane, cell wall and capsule (Picture 1). Certain bacteria use flagella, tail-like appendages, to propel themselves.
All U.S. savings bonds have a final maturity date when they stop earning interest. Investors often lose track of this date because the U.S. Treasury Department has extended the original maturity of some bonds up to 30 years.
EE savings bonds with issue dates after June 2003 have an original maturity date of 20 years from issue. Earlier EE bonds had varying lengths of time to original maturity. For example, bonds dated between March 1993 and April 1995 have an original maturity of 18 years. Bonds issued after May 2005 pay a fixed interest rate, but the Treasury guarantees that their value will double in 20 years, at original maturity.