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.
Backed by the U.S. government, savings bonds are extremely safe. But a tradeoff for that safety is a relatively low rate of return. The current interest rate on Series EE bonds is 1.30%, through April 30, 2009. New interest rates are announced twice a year and take effect May 1 and November 1. If held for five years, Series EE bonds pay 90% of the six-month average yield on five-year Treasury securities. Earnings vary for Series EE bonds issued from 1980 to 1997, so consult your financial institution or the Bureau of Public Debt for exact figures. Many Series E bonds have stopped paying interest.