What effect did an isolated environment have on marsupials? * It made the koala become the most famous and popular marsupial.
Marsupials spread all over the world so that they could survive.
There are now many different species of marsupials in Oceania.
It caused meat-eating marsupials to become extinct.

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 would be d : p

huh

explanation:

cell/ tissue/ organ/ organ system/ body