The Bassoon double reeds are broader and shorter than the oboe double reeds, so they do not need a tight embouchure to produce sound. Almost all the double reed embouchures are similar and the musicians need to pull their lips over their teeth to protect the reed from their teeth. Â© 2015 Music & Arts. All rights reserved. Terms & Conditions Privacy Policy. Music & Arts. 4626 Wedgewood Blvd.
Scientists have found that memories may be passed down through generations in our DNA. New research from Emory University School of Medicine, in Atlanta, has shown that it is possible for some information to be inherited biologically through chemical changes that occur in DNA.
Scientists study DNA for many reasons: They can figure out how the instructions stored in DNA help your body to function properly. They can use DNA to make new medicines or genetically modify crops to be resistant to insects. They can solve who is a suspect of a crime, and can even use ancient DNA to reconstruct evolutionary histories! To get the DNA from a cell, scientists typically rely on one of many DNA extraction kits available from biotechnology companies. During a DNA extraction, a detergent will cause the cell to pop open, or lyse, so that the DNA is released into solution. Then alcohol added to the solution causes the DNA to precipitate out. In this activity, strawberries will be used because each strawberry cell has eight copies of the genome, giving them a lot of DNA per cell.