Using the drop-down menus, identify the parts of the lower respiratory system from the descriptions below.

The are enclosed in a membrane called the pleura.
The are branch-like extensions found in the lower respiratory system.
Identify the structures labeled in the diagram to the right.
Label A
In the 1930s, medical journal articles linked asbestos to cancer.

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.

age range would be the answer