Eukaryotic cells have membrane-bound organelles that result in the formation of compartment-like structure.
this is useful for cell because it
a. enable particular molecules to selectively enter and exit the cell.
b. maintains the total isolation of the nucleus from cytosol.
c. provides a structural network that act to support the cell.
d. creates a variety of intercellular environments.

answer; i believe that the correct answer is ; males are hemizygous for the x chromosome;

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.