Which prevents the fac genes in the dna of e. coli from being expressed most of the time?
the lac repressor
the lac operator
the lac promoter
the lac locator

The united states produces an average of 429 billion pounds of food annually. about 133 billion pounds of that food ends up as waste. the percentage of food that the united states wastes each year is %.

Write the balanced chemical equation forphotosynthesis.

The mixture of sperm and fluids from the seminal vesicles, prostate gland, and cowper's glands is called