A Sample of Chargaff's Data on the DNA Base Composition

Essay

A sample of Chargaff's data on the DNA base composition in various species is provided.Discuss several conclusions that may be drawn from this data.
$$\begin{array} { | c | c | c | c | c | } \hline \text { SPECIES } & \text { A } & \mathrm { T } & \mathrm { G } & \mathrm { C } \\\hline \text { Hurnar1 } & 31.0 & 31.5 & 19.4 & 18.4 \\\hline \text { Fruit fly } & 27.3 & 27.6 & 22.5 & 22.5 \\\hline \text { Corn } & 25.6 & 25.3 & 24.5 & 24.6 \\\hline \text { Neurospora (furgus) } & 23.0 & 23.3 & 27.1 & 26.6 \\\hline \text { E coli (bacteriurn) } & 24.6 & 24.3 & 25.5 & 25.6 \\\hline\end{array}$$