Rick uses an electronic air sampler to determine the amount of dangerous chemicals in the air.

which functions of the air sampler confirm that it is an electronic tool? check all that apply.

The trp operon in e. coli regulates genes that code for enzymes required for synthesis of the repressible operon. when tryptophan is not available amino acid tryptophan. the trp operon is a in the environment, the trp repressor protein activeinactiveregulated. therefore, rna polymerase can bind to the genes to begin transcription.

How did the research presented in the article affect scientists' understanding of the evolution of eukaryotes

Eutrophication caused by human nutrient pollution.