Living matter is at least sixty percent water. it makes sense then cell membranes are made of phospholipids because

The non-polar fatty acid tails of amphipathic phospholipids make the insoluble boundary of cells.

Explanation:

Cell membranes are bilayer of phospholipids. Phospholipids are amphipathic molecules and have a polar head and non-polar tail. The non-polar tails of two phospholipid layers are buried and make the core of the membrane while the polar heads are located towards the surrounding water.

This arrangement of phospholipids makes an insoluble covering of cell and helps the cell to maintain the interior distinct from the surroundings.

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.

answer: oof wait

explanation: