A genetics research scientist is conducting research on the genome of the Duck- billed platypus. The scientist wants to know the percentage composition of each
nucleotide within the genome. The scientist found that there existed 22% Cytosine in
the Duck-billed Platypus genome. Using Chargaff's rule, determine what is the
percentage of Guanine, Adenine, and Thymine in the Duck-billed Platypus genome.

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i don't know, but does anyone wanna be friends? i'm doing my homework at 1: 49 in the morning : /

the correct answer is 4) heat and pressure

metamorphic rocks arise from transformation of existing rocks types, in a process called metamorphism. during metamorphism the original rock(prolith) change into metamorphic rock by heating (150-200c) and pressure of more than 1000 bar. the original rock can be sedimentary, igneous, or existing metamorphic rock.