In biology class one day, mrs. chabon wrote six physiological functions on the board. then, she asked groups of students to each choose the three functions that are purposes of the excretory system. these are the lists they made. group 1: maintaining ph level of blood; transporting hormones throughout the body; regulating growth group 2: removing wastes from the body; digesting solid foods; maintaining salt and water balance group 3: maintaining salt and water balance; maintaining ph level of blood; regulating growth group 4: removing wastes from the body; maintaining ph level of blood; maintaining salt and water balance which group correctly listed the functions of the excretory system? group 1 group 2 group 3 group 4

b.

hoped i

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.