Characteristics of evolution in points.

Five different forces have influenced human evolution: natural selection, random

genetic drift, mutation, population mating structure, and culture. All evolutionary biologists

agree on the first three of these forces, although there have been disputes at times about the

relative importance of each force. The fourth and fifth forces are new in the sense that they

are not explicated in more traditional texts. This is not an attempt to develop a “new”

theory of human evolution. Instead, the forces of population mating structure and culture

are arbitrary categorizations used to organize several different phenomena of human

evolution. Scientists agree on the phenomena themselves, although they do not always

organize them the same way.

Explanation:

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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.