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.
Mistake to Avoid: Holding US Savings Bonds After Interest Has Stopped Accruing. United States Savings Bonds have been one of the most popular ways for Americans to save for more than 75 years. As a result of purchases or gifts, more than 55 million people currently own approximately $180 billion in savings bonds. But some savings bonds have quit earning interest. Savings bonds earn interest for different lengths of time, depending on the series and when the bond was issued. It is important to check any savings bonds you have to make sure they are still earning interest.