Answer:Prokaryotes play several roles in the nitrogen cycle. Nitrogen-fixing bacteria in the soil and within the root nodules of some plants convert nitrogen gas in the atmosphere to ammonia. Nitrifying bacteria convert ammonia to nitrites or nitrates. ... Denitrifying bacteria converts nitrates back to nitrogen gas.
Explanation:
Based on the graphs, the environment must have favoured, by natural selection, the birds with larger beaks because the species of birds have evolved to have larger beaks.
The eradication of insects by disease must have cause starvation to the small-beaked birds hence causing their demise. In addition, the insects no longer compete for fruits with the large-beaked birds. The plentiful fruits lead to the growth of large beaked birds in the population.
Explanation:
Natural selection fits a population with its environment by favouring individuals with advantageous traits. These individuals outcompete the others for resources and stand greater chances for reaching maturity and passing down their genes to the subsequent generation. This is how species evolve with enviromental changes.
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I believe the answer is natural selection..plse dbl check...
Watson and Crick first discovered the structure of the DNA molecule. The structure was described as having a double helical structure. The structure is composed of molecules or bases called nucleotides. The structure was found to have 4 basic nucleotides or base pairs. They are namely adenine, guanine, cytosine and thymine.