Human phenotypic variation Group of answer choices a) we can divide humans using discrete traits like ear wax or the ABO blood system, but these don't fit into our generally recognized racial categories b) we can divide humans using continuous traits, but this requires we have an arbitrary cut off for each category (skin color is an example) c) there is no combination of traits that can be used to divide humans into discrete, racial categories d) all of the above

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.

i believe it would be c: tons.