Carlos learns that all living things have cells with the same system of genetic material. Scientists have concluded that this sh
ows that all living things had a common ancestor. Carlos finds this difficult to understand as he looks at pictures of a dog and snake. He cannot see many similarities between them, but what shows evidence of their common evolutionary past?
A. DNA
B. gene transfer
C. natural selection
D. endosymbiosis
The greatest common factor (GCF) of a set of numbers is the largest factor that all the numbers share. Simplified expression is an expression that has been condensed and shortened, so that all the like terms have been combined.
