Which of the following occurs as a result of an abundance of tryptophan in e. coli?

a) the 5 trp genes (trpa - trpe) are not transcribed.
b) stalling of the ribosome at trp codons in the leader sequence
c) the 5 trp genes (trpa - trpe) are transcribed, but not translated.
d) the leader sequence is not transcribed.

A) The 5 trp genes (TrpA - TrpE) are not transcribed.

Explanation:

step 1 ammonium can be absorbed by plants, but some is converted into nitrates which are better for plants to absorb. this is called nitrification. 2. step 2 the deer eats the plants and uses the nitrogen-containing proteins for cell growth. 3. step 3 bacteria in the soil conduct nitrogen fixation to convert nitrogen gas from the atmosphere into ammonium. 4. step 4 some of the nitrates are absorbed back into plants, but denitrification breaks down the nitrates into nitrogen gas released back into the atmosphere. 5. step 5 nitrogen is found in the urine, which gets broken down into ammonium through the process of ammonification. 6. step 6 plants absorb the ammonium and begin assimilation, the process to add the nitrogen to protein.

the correct answer is:

a population changes in response to a change in the environment.