That is, the metabolic cycle originally went in reverse and was associated with efficient chemical breakdown of more complex carbon compounds to carbon dioxide and water.
(the metabolic cycle; went; in reverse; T:originally) (the metabolic cycle; was associated; with efficient chemical breakdown of more complex carbon compounds to carbon dioxide and water)
the metabolic cycle the metabolic cycle
went was associated
in reverse T:originally
with efficient chemical breakdown of more complex carbon compounds to carbon dioxide and water