Zadanie 5b
Describe the role of decomposers.
Decomposition and nutrient recycling
Explain the return of chemical elements to reusable forms and the central role of decomposers in ecosystems.
Tę umiejętność sprawdza 9 zadań wzorowanych na arkuszach IB z lat 2022–2025.
Zadania sprawdzające tę umiejętność: 9 Otwórz w wyszukiwarce z filtrami
Zadanie 1a
(i) Draw one plausible four-level food chain using the organism groups listed. (ii) Suggest one way fish could increase the supply of nutrients in lake water.
- Materiał graficzny
Zadanie 16
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…
Zadanie 17
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…
- Materiał graficzny
Zadanie 12c
(i) Analyse the effect of grazers on species richness. (ii) Suggest reasons for an increase in richness.
- Materiał graficzny
Zadanie 15b
Two conceptual models compare nutrient stores and flows in biomes. Deduce which nutrient store is represented by Z, giving a reason.
- Materiał graficzny
Zadanie 18
A sealed terrarium receives light but no added material. Which observation best supports its continued functioning over many months? A. Mineral nutrients released from wastes and dead matter are reused by plants B. The number of species rises, even if…
Zadanie 8b
A microbial biogas digester leaves a solid and liquid organic residue. State one useful application of this residue.
Zadanie 18
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…