if EB=EC and AB=DC prove <A=<D
What have we got to prove? Whether we have to prove a triangle as an Isoseles triangle or prove a property of an isoseles triangle. Hey, do u go to ALHS, i had that same problem on my test today. Greenehornet15@yahoo.com
prove the intersction for crisp set theory
prove- show someone that you can do it, or show someone somthing that they dont believe.
To prove a statement false, you need ONE example of when it is not true.To prove it true, you need to show it is ALWAYS true.
Constantin Daniel Stahi was born on 1844-11-14.
Constantin Daniel Stahi died on 1920-06-18.
Matthew Meselson was born on 1930-05-24.
The experiment that supported the hypothesis that DNA replication was semiconservative was known as the Meselson-Stahl Experiment.
Meselson and Stahl
nitrogen
density gradient centrifugation
Watson and Crick mentioned it slightly in their paper but didn't propose a full method of replication. a number of different people collaborated to work out the full model of replication which is still no totaly finished, (few proteins left to find)
M. Meselson and F. W. Stahl
Meselson and Stahl conducted an experiment in 1958, and discovered that DNA replication was semiconservative. In semiconservative replication, when the double stranded DNA helix is replicated each of the two new double-stranded DNA helixes consisted of one strand from the original helix and one newly synthesized.
Matthew Meselson and Franklin Stahl show how new DNA is made by copying the old.
Meselson and Stahl used isotopes of nitrogen because DNA is made up of nitrogenous bases which are, as the name suggests, made up of nitrogen. I suppose they could have used phosphorus like Hershey and Chase did. But they are limited to the atoms that are present in DNA. There may be other reasons involved that would require digging up and taking into account of the the knowledge available in the 1950's (at that time).