Which body system moves oxygen ito the blood and removes carbon dioxide from the blood?

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.

Which is one example of a phenotypic change that is not genetic

Which of the following was not a major animal on land during the carboniferous period? amphibians insects both a and b none of the above