For
most of my life, when I read or heard the word “Earth” – anywhere -- the picture that popped into my mind was the familiar
photograph of the Earth that has been taken from space. How could it be anything else! Well
it did!!! Continue reading at --
SOURCE 1 The above picture was taken in 1953 when James Watson (left) and Francis Crick presented their model of a DNA molecule ( deoxyribonucleic acid model ). They had pieced together pieces of a scientific puzzle that scientists had been working on for many years. With the discovery of this model a new way of understanding life began -- humans could understand the basic building blocks of life for the first time in history. 2 Image Source 3 DNA is a double-stranded molecule that encodes the genetic instructions used in the development and functioning of all known living organisms and many viruses. 4 3,000,000 species share this genetic code. The DNA alphabet consists of four letters that represent the four chemical bases that make up the rungs of the DNA – A, T, G & C . ● A - adenine ● G - guanine ● C - cytosine ● T - thymine Be sure to note that rungs are made of combinations of “ A and T ” or “ C and G .” The h...
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