Leaving Certification Ecology Practice Exam 2025 – All-In-One Study Guide for Success!

Question: 1 / 400

What role do decomposers play in an ecosystem?

They produce energy through photosynthesis

They consume live plants and animals

They break down dead organic matter

Decomposers play a crucial role in ecosystems by breaking down dead organic matter, such as fallen leaves, dead animals, and other organic material. This process of decomposition is vital for nutrient cycling within the ecosystem. When decomposers, such as bacteria and fungi, break down dead matter, they release nutrients back into the soil, making them available for plants to use. This not only enriches the soil but also supports the growth of new plants, forming an essential part of the food web.

Furthermore, without decomposers, dead matter would accumulate, and nutrients would become locked away in unavailable forms, leading to a decline in soil fertility and disrupting the balance of the ecosystem. This highlights how decomposers act as nature's recyclers, ensuring that energy flow and nutrient cycling continue efficiently within the ecosystem.

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They limit the population of herbivores

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