Answer:
Sigma factors bind to the promoter region of a particular gene and facilitating the binding of RNA Polymerase to the promoter region (formation of the RNA polymerase holoenzyme complex) in order initiate transcription of the gene.
Put simply - Helps RNA Polymerase do it's job.
Answer: Warmer water in the eastern pacific ocean blown by wind
Explanation:
Because there is less available energy at the top of the pyramid and the higher up on the pyramid the organism needs more energy
