Essay
Your friend has just returned from a deep-sea mission and claims to have found a new single-celled life form.He believes this new life form may not have descended from the common ancestor that all types of life on Earth share.You are convinced that he must be wrong, and you manage to extract DNA from the cells he has discovered.He says that the mere presence of DNA is not enough to prove the point: his cells might have adopted DNA as a useful molecule quite independently of all other known life-forms.What could you do to provide additional evidence to support your argument?
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