Provide a scenario in which a species becomes extinct.
In your scenario, discuss the hypothetical extinction of a current living species. This extinction could be caused by humans or by natural events in the species' ecosystem.
What factors lead to the extinction of this species?
How will the absence of this species affect the remaining organisms in that ecosystem?
Provide specific examples to support your answers.
Your friend says that organisms that require oxygen existed before photosynthetic organisms. Do you support this idea? Explain why or why not.