What statement best describes an independent variable?
a. the factor that's changed by the experimenter and impacts the constant in an experiment
b. the factor that doesn't change, but impacts the constant in an experiment
c. the factor that isn't changed by the experimenter and is impacted by the dependent variable
d. the factor that's changed by the experimenter and impacts the dependent variable

D. The factor that's changed by the experimenter and impacts the dependent variable

I learned this in Science Class

It's part of the Scientific Method

nucleic acid molecules are incredibly complex, containing the code that guarantees the four different nucleotide units comprise dna, the nucleic acid of interest to the genealogist. and one of four nitrogen-containing molecules called nucleotides

if you add everything up correctly you should get 69 i got this because 50 plus 19 is it