Which of these statements about the relative toxicity, water costs, and energy costs of the different nitrogenous waste removal methods (direct ammonia release or conversion into urea or uric acid) is NOT true?

A. Conversion into urea requires the most water
B. The toxicity level of urea is intermediate between that of ammonia and uric acid
C. Ammonia is the most toxic
D. Conversion into uric acid requires the most energy

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.

what bodys are there orbiting?

well, i believe that the answer is 2. : 3