Use the drop-down menus to complete the sentences.

confirmed the three-dimensional structure of DNA.

first discovered DNA and named it “nuclein.”

first photo of DNA which helped scientists understand its structure.

studied DNA using special X-rays.

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 of the following is a consequence of urban heat islands? increased precipitation downwind of the city? increased precipitation upwind of the city? decreased winds within the city? increased winds within the city?

Moving down the ramp from 6 meters to