Question In a stable natural ecosystem, how is the supply of nutrients and energy maintained?
A. Nutrients and energy are efficiently cycled within the ecosystem.
B. Energy from the Sun is cycled through the food chains, while nutrients are constantly lost.
C. Nutrients are efficiently cycled within the ecosystem, while there is a constant flow of energy.
D. Energy is cycled through photosynthesis and respiration, while food chains ensure that nutrients flow through the ecosystem.
▶️Answer/Explanation
Ans: C
Question
Which processes occur in an ecosystem?
I. Biomass increases in each successive trophic level.
II. Inorganic nutrients are recycled.
III. Chemical energy is stored in carbon compounds.
A. I and II only
B. I and III only
C. II and III only
D. I, II and III
▶️Answer/Explanation
Ans:
C
Question
The global carbon cycle involves sinks where carbon is stored, and fluxes where carbon is transferred. What are the largest sink and flux?
▶️Answer/Explanation
Ans:C