look at the tow dna molecules in table i what nitrogenous bases in the sickle mutation dna are different those of the normal dna?

amber has allowed scientists to study dna that has been preserved over millions of years.

try using substitution:

x + y - 6 = x - y. (i'm not giving you the exact answer). since 0 = x - y, then sub 0 in the equation with x - y. combine your like terms, and then use inverse operations, and you'll have your answer.

: -)

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