Long term environmental change to an area is likely to create selective pressure that will
A. mutate the genetic makeup of organisms

B. influence adaptations of populations over time.

C. cause a decrease in reproductive rates.

B. allow organisms to select the best adaptations.

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.

The tubes transporting minerals and water upward are called ?

Explain how sequences of amino acids in proteins can be used to reveal relationships among organisms.