Darwin hypothesized that there are definite steps to natural selection. One is populations are large and in the population variation
exists. Consider this population of disease-causing bacteria What is the MOST LIKELY cause for variation in this population?
A)
over-population
drug resistance
genetic mutation
g
sexual reproduction
thas white fut in winter and dark for in summer. What is the main survival advantage of this fur color change

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.

there really is life in the deepest part

the correct answer is d