Order the Following Metabolic Innovations to Reflect the Most Likely

question 34

Short Answer

Order the following metabolic innovations to reflect the most likely order in which they evolved during biological evolution. Your answer would be a four-letter string composed of letters A to D only, e.g. BDCA.
(A) Using light energy to generate reducing power
(B) Splitting of water molecules (an electron source)
(C) Fermentation of organic material
(D) Reduction of molecular oxygen (a terminal electron acceptor)

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Definitions:

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A method of prospecting whereby a salesperson asks each buyer for a list of friends who might also be interested in buying the product.

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Referral

The action of directing someone to a different person or place for information, help, or action, often leading to new business opportunities.