an analysis of an octopus's dna determines that the nitrogen base thymine marks up 18 percent of the genome. which of the following best represents the percent of guanine in the octopus's genome

32percent

Explanation:

Chargaff rule states that a DNA has this base pair arrangements

Adenine-Thymine

Cytosine-Guanine

The base pairs also contain almost equal amount of substance in them.

This means Thymine which has 18percent also has 18percent Adenine in the base pair

The remaining percentage will be calculated by 100-18+18=100-36=64

Cytosine and Guanine will share the remaining the 64% which translates to 32% for each of them.

Cytosine-32% and Guanine=32%