Explain the return of chemical elements to reusable forms and the central role of decomposers in ecosystems.
Tę umiejętność sprawdza 8 zadań wzorowanych na arkuszach IB z lat 2022–2024.
Over many generations, what allows a largely self-sustaining forest ecosystem to retain its biological activity? A. Nutrients can be reused only if energy is also recycled B. Elements are recycled while energy is continually supplied and ultimately dissipated…
Identify P, Q and R in this model of a sunlit meadow ecosystem. A. P: minerals; Q: oxygen; R: chemical energy B. P: sunlight; Q: dissipated heat; R: inorganic nutrients C. P: glucose from space; Q: new carbon atoms; R: sunlight D. P: heat recycled from…
Phosphate fertilizer is applied to farmland. Discuss benefits and risks of this practice.
Two conceptual models compare nutrient stores and flows in biomes. Deduce which nutrient store is represented by X, giving a reason.
Phosphate becomes available to organisms through several processes. State two sources of phosphate in an ecosystem.
Outline requirements for a sealed mesocosm to sustain its community.
Suggest two factors other than elevation that could explain differences in leaf nitrogen.
A sealed illuminated model ecosystem contains a small plant and initially adequate water, air and mineral ions. Decomposers are excluded, while dead plant material accumulates over a long period. Which limitation would eventually result from the missing…
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