What type of mutation is likely to cause the most dramatic phenotypic change? -Single nucleotide insertion that changes codon groupings
-Single nucleotide change that affects the third position in a codon
-Base pair substitution that codes for the same amino acid as original
-Mutation that causes a new amino acid with similar chemical properties

i think it is true in my reasonment ..

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.

option c is the correct answer.