HELP ASAP BIO PLEASEE Which of the following reservoirs is most important for Ni
ID: 176290 • Letter: H
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HELP ASAP BIO PLEASEE
Which of the following reservoirs is most important for Nitrogen? the atmosphere ocean sediments fossil deposits Coral reefs None of the above are important If the background rate of extinction were applied to birds, perhaps 2-4 birds should have gone to extinct over the course of the last 800 years. What is the actual figure, and what does this mean for birds? 6 Birds are going extinct at their background rate, as predicted by the model. 20 Birds have a higher than predicted rate of extinction, though it is not clear humans have had any effect. Between 200 and 2000. Birds, like many other species are in the midst of a major mass extinction event, with causes related to humans. More than 2000. Competition with mammals and insects, related to climate change, can explain most of these extinctions. Impossible to tell. Which of the following statements about keystone predators is true? They usually competitively exclude other predators from the community They often maintain species diversity by preying upon the prey species that is the dominant competitor. They often increase the relative abundance of the most competitive prey species. They are not necessarily the most conspicuous, or abundant species in the community. B and DExplanation / Answer
5. The atmosphere
Nitrogen comprises 79% of the atmosphere. However, this is in the inert form and is not available to organisms. The lightning events that occur naturally breaks nitrogen and combine them with oxygen, forming nitrogen oxides. Precipitation and rains dissolve these nitrogen oxides, forming nitrates, which are brought down to earth. Apart from this, microorganisms can fix atmoshperic nitrogen into soluble forms that can be utilized by the planst.
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