RENR Quiz Questions 2026 – Revision and Practice Set
What do they put in fertilizer? - correct answer ✔✔Limiting nutrients - Phosphorus and
Nitrogen
Nitrogen enters ecosystems by ________________ and leaves by __________ - correct answer
✔✔Nitrogen fixation denitrification
Nitrogen immobilization by primary producers involves transformation of ____________ to
____________. - correct answer ✔✔inorganic forms organic forms
Mineralization is the opposite of what process in the Nitrogen cycle? - correct answer
✔✔Immobilization
What are potential consequences of industrial fixation? - correct answer ✔✔Acid rain,
eutrophication
Algal blooms cause rates of decomposition to - correct answer ✔✔Increase
Algal blooms cause dissolved oxygen levels in water to - correct answer ✔✔Decrease
The rates of nitrogen fixation and denitrification are approximately - correct answer ✔✔Equal
Contrast the movement of energy and nutrients in an ecosystem - correct answer ✔✔nutrients
are cyclic while energy is unidirectional
At what point in the nitrogen cycle do heterotrophs access nitrogen? - correct answer
✔✔Assimilation
What do they put in fertilizer? - correct answer ✔✔Limiting nutrients - Phosphorus and
Nitrogen
Nitrogen enters ecosystems by ________________ and leaves by __________ - correct answer
✔✔Nitrogen fixation denitrification
Nitrogen immobilization by primary producers involves transformation of ____________ to
____________. - correct answer ✔✔inorganic forms organic forms
Mineralization is the opposite of what process in the Nitrogen cycle? - correct answer
✔✔Immobilization
What are potential consequences of industrial fixation? - correct answer ✔✔Acid rain,
eutrophication
Algal blooms cause rates of decomposition to - correct answer ✔✔Increase
Algal blooms cause dissolved oxygen levels in water to - correct answer ✔✔Decrease
The rates of nitrogen fixation and denitrification are approximately - correct answer ✔✔Equal
Contrast the movement of energy and nutrients in an ecosystem - correct answer ✔✔nutrients
are cyclic while energy is unidirectional
At what point in the nitrogen cycle do heterotrophs access nitrogen? - correct answer
✔✔Assimilation
