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.
Final Maturity. Series EE savings bond don't stop earning interest as soon as they double their face value. Rather, they have a final maturity of 30 years. This means that the bond will continue earning interest for 30 years after you bought it, regardless of whether it doubles in value after 20 years with a special Treasury payment or earlier.