Actually this is a question which is given in a book and to be honest,it has baffled me.I'm not so much well versed with molecular evolution so my guess would be,say some sort of enzyme which could catalyse more than 1 reaction maybe coz then that 1 will be sufficient enough to do much more work,like it happens at organismic level,like reduction in legs of prawns and shrimps which has happened (earlier relatives has more legs but they were less effective as compared to their modern counterparts).So,my guess would be something like that but as I said earlier,I'm not so good in molecular evolution so please help me out.Or tell me about what were the characteristics or primitive macromolecules and those that occur today and via that,this question might be explained.Also,I've written the question as such given in the book i.e without any changes.

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    $\begingroup$ This is a nonsensical question akin to asking you to predict the future. Sure, further evolution of proteins etc may occur, but there is no “master plan”. Whatever TBH is should be ashamed of itself. I vote to close. $\endgroup$
    – David
    Jan 18, 2019 at 15:15
  • $\begingroup$ I'm voting to close this question as off-topic because the question is based on a false assumption. $\endgroup$
    – David
    Jan 18, 2019 at 15:16
  • $\begingroup$ Your question is not clear. Can you please edit it? Add more relevant details if necessary. $\endgroup$
    Jan 18, 2019 at 17:17
  • $\begingroup$ Well,can you explain that what are the changes that anyone have observed in the macromolecules of say the Proterozoic era or Palaeozoic era and the macromolecules that occur today.I guess that the book might be asking for this......... $\endgroup$ Jan 19, 2019 at 3:26
  • $\begingroup$ "I guess that the book might be asking..." is not good enough. Please edit your question with a direct quotation from the book and naming the book, author and publisher. In addition please remove the non-unicode, non-isolatin character at the end of your title and explain what TBH is quoting from that (or delete any mention of it). As I have already commented, the question as you pose it is in my opinion based on a false assumption, namely that evolution is directed "towards" something. If this was only your interpretation of a book, then we can help you if we know what was written. $\endgroup$
    – David
    Jan 19, 2019 at 19:41


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