EEB 2100 UCONN EXAM 1 ACTUAL 2025/2026 WITH VERIFIED ANSWERS

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EEB 2100 UCONN EXAM 1 ACTUAL 2025/2026 QUESTIONS AND 100% CORRECT ANSWERS Main questions of course - Answer -1. How do humans alter earth 2. how do human alterations affect the biosphere 3. What can be done to alleviate human alterations of the biosphere Greatest ecological impacts of humans(most to least) - Answer -1. Nitrogen fixation 2. Water use 3. Land transformation 4. CO2 concentration rise 5. Ocean acidification 6. Bird extinction 7. Plant invasion Planetary Boundaries - Answer -Limits between which global systems must operate to prevent abrupt and irreversible environmental change Planetary Boundaries that have been crossed - Answer -1. Biogeochemical flows of Nitrogen and Phosphorous(Nitrogen fixation) 2. Genetic diversity (biodiversity loss) Success story of planetary boundaries - Answer -Restoration of the ozone layer Non-linear dynamics - Answer -Outcome is not proportional to input - to revert back to a stable state, it will take more effort than getting to where you are now(It takes much less equipment to pollute a pond than Need assistance on Online classes, Exams & Assignments? Reach out for instant help!! Full Course Assistance, Plagiarism-free Essay Writing, Research Paper, Dissertation, Discussion Posts, etc…. Confidential & Secure services. Tutors are available for all subjects! Email now at: tutorjean01@gmail.com to clean it up after it has been polluted) Tipping Points - Answer -a critical threshold when a small change can have potentially drastic effects. Mostly linked to climate change and pollution and the increase in the emmition of greenhouse gases Increased atmospheric CO2 - Answer -Result of increased burning of fossil fuels and land use change(getting rid of plants by burning which uptake CO2) -caused global warming of 0.8-1.2 degrees Celsius Oceanic CO2 - Answer --25% of carbon from CO2 gets taken up by oceans -Caused the average ocean ph to drop by 0.1 units and because ph is a log scale resulted in 26% increased acidity causing major changes to ocean ecology nitrogen fixation - Answer -process of converting nitrogen gas into nitrogen compounds that plants can absorb and use Nitrogen in Ecosystemsdont understand - Answer -added to ecosystems through fixation by microorganisms and limits the growth of many ecosystems Large mammal biomass - Answer -97% of large mammal biomass is human(30%) or domestic animals(67%) Human water use - Answer --35% of all of the earths usable water goes toward agricultural needs while 15% goes to other human needs -37% of rivers globally including 2% in the US are UNimpeded by dams which makes it hard for microorganisms and fish to travel Extinction rate on earth - Answer --100-1000 times the background rate -Yearly loss of 11-58k species -Rates only comparable to 5 times in last 500 million years which could indicate 6th mass extinction Need assistance on Online classes, Exams & Assignments? Reach out for instant help!! Full Course Assistance, Plagiarism-free Essay Writing, Research Paper, Dissertation, Discussion Posts, etc…. Confidential & Secure services. Tutors are available for all subjects! Email now at: tutorjean01@gmail.com