A dichotomous key for trees is provided. Hikers found a tree that has large 1 point brown cones and single sharp needles. What species of tree have the
hikers found? *
1
N
a. Cones are small
b. Cones are large
a. Needles are single
b. Needles are in groups of 2 or more
a. Needles are sharp at the end
b. Needles are rounded at the end
Juniper
Go to step 2
Go to step 3
Pine
Spruce
Fir

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.

it's c.us forest service