Answer:
Glycolysis evolved before Kreb's cycle and Electron Transport chain. This view is supported by following facts:
- Glucose cannot enter the mitochondria and it needs to be broken down into pyruvate in the cytosol by the process of glycolysis.
- Pyruvate then forms acetyl CoA that enters the mitochondria where it undergoes Kreb's cycle.
- The Electron transport Chain occurs by passing of electron and finally donating it to the electron acceptor oxygen. The molecules of NADH produced in the preparatory phase of glycolysis provides the electron for electron transport chain.
- Thus Glycolysis must have evolved before Kreb's Cycle and Electron Transport Chain otherwise the raw materials for both the processes would not have been available.
Answer:
Some organs are both a source and sink. Leaves are sinks when growing and sources when photosynthesizing. Rhizomes are sinks when growing but become sources in the spring when they provide energy for new growth.
More advanced than tools used on earth
Pretty certain its Succession
