alleryStart learning →The universality of the genetic code is described as powerful evidence that life on Earth shares:
AA common origin
BAn identical genome
CThe same environment
DOne reproductive mode
Answer & Solution
Correct answer: A. A common origin
1. The same code appears across very different organisms.
2. There is only one genetic code across life on Earth.
3. That is powerful evidence that all of life on Earth shares a common origin.
4. The point is stronger given about 10 to the 84 possible combinations.
5. Those combinations come from 20 amino acids and 64 triplet codons.
_Source: OpenStax Biology 2e (CC BY 4.0), Ch 15 'Genes and Proteins', sections 15.1-15.5_
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