Transcription of genes by rna polymerase requires energy, so a bacteria's operon is usually not always turned on. in e. coli bacteria, the trp operon encodes genes for the synthesis of tryptophan, and the lac operon encodes genes for the digestion of lactose. which strain of e. coli is likely to use its energy most efficiently?

coal is not sustainable because it will one day run out.

stimulus is a change in the environment that causes an organism to react. the response is the reaction to the stimulus. some examples of stimuli for zebras are drought, to many predators, and bad feeding grounds such as dead grass or plants. zebras respond to stimuli just like all other living organisms

sorry to break it to ya but no one can answer your question it's just

jk but i am serious about the part that most people cant answer it beacuse you did not mention the section you are talking about. but it would if you added some detail and were a bit more specific.