Erwin Chargaff examined DNA samples from different organisms to study base pairing. Some data from DNA samples are shown.
Organism Adenine Guanine Cytosine Thymine
Sea urchin 32.8% 17.7% 17.3% 32.1%
Salmon 29.7% 20.8% 20.4% 29.1%
Wheat 28.15 21.8% 22.7% 27.4%
Which conclusion contains more cytosine than any other base.
A. Each organism contains more cytosine than any other base.
B. The three organisms have the same sequence of nucleotides.
C. All three organisms contain the same types of nitrogen bases.
D. The presence of each base is dependent on the size of the organism.