Was there variation in our population? why or why not? explain

In general in which direction does wind blow

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.

Compare the composition of the moon's surface with the composition of the earth's surface.