Examine the evolutionary tree below. This tree tells us that the amnion is found in .
a. lungfishes and amphibians
b. mammals, lizards, and snakes only
c. mammals, lizards, snakes, crocodiles, and birds
d. amphibians only

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 answer is otpion c) understanding

he wants to be heard one more time. he wants to be understood. he needs the truth one more time.

what's the question ?

1. efficient use of space

2. elimination of groundwater contamination

3. energy generation

4. lower carbon footprint