Question

The reactions of glycolysis are identical in all organisms--prokaryotes, protists, fungi, plants, and animals--that obtain energy from glucose catabolism. What does this universality suggest about the evolution of glycolysis?

Answer 1

Is that from this book?
http://books.google.com/books?id=Z0rAAgAAQBAJ&pg=PT217&lpg=PT217&dq=The+reactions+of+glycolysis+are+identical+in+all+organisms--prokaryotes,+protists,+fungi,+plants,+and+animals--that+obtain+energy+from+glucose+catabolism.+What+does+this+universality+suggest+about+the+evolution+of+glycolysis?&source=bl&ots=Dv-w4Qo2i7&sig=DLXyOkZjS98FeVbses4ylSJXU3o&hl=en&sa=X&ei=VJ8kVKfoNImcoQSu14DICQ&ved=0CCAQ6AEwAA#v=onepage&q=The%20reactions%20of%20glycolysis%20are%20identical%20in%20all%20organisms--prokaryotes%2C%20protists%2C%20fungi%2C%20plants%2C%20and%20animals--that%20obtain%20energy%20from%20glucose%20catabolism.%20What%20does%20this%20universality%20suggest%20about%20the%20evolution%20of%20glycolysis%3F&f=false

Answer 2

I think that this suggests that glycolysis evolved once in a common ancestor of all these organisms, or that glycolysis evolved separately many times,