TFIIE -80 to +30 For bacterial RNA polymerase, only the sigma factor is needed for the enzyme to recognize the promoter. The eukaryotic transcription factors may indeed act as sigma factors to allow the eukaryoitic RNA polymerase to recognize the promoter.
An energy pyramid is the graphical representation of the trophic levels (nutritional) by which the incoming solar energy is transferred into an ecosystem.The source of energy for living beings on Earth is the Sun.The energy that the Sun emits at present is of 1366.75 W/m^2 (400 years ago, it was of 1363.48 W/m^2).n energy pyramid is the graphical representation of the trophic levels (nutritional) by which the incoming solar energy is transferred into an ecosystem.
The sun and then the primary producers which are able to convert the energy from the sun into a form that can be used to the rest of the creatures on the energy pyramid.13 people found this useful. Edit. Share to: Answered. In Animal Life.he amount of energy being passed on decreases as the pyramid goes up. For example, if the pyramid had 5 flowers on the bottom, 3 rabbits in the middle, and a h â¦ awk on top, the most energy would be with the flowers, and least passed on to the hawk.