What are the two main processes that ecosystems depend upon?
A. speciation and evolution
B. nutrient recycling and energy flow
C. decomposition and nutrient recycling
D. sunlight and photosynthesis
Answer:B
What are the two main processes that ecosystems depend upon?
A. speciation and evolution B. nutrient recycling and energy flow C. decomposition and nutrient recycling D. sunlight and photosynthesis