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TEAS Science Practice Tests & Test Prep by Exam Edge - Free Test


Our free TEAS Test of Essential Academic Skills Science Practice Test was created by experienced educators who designed them to align with the official Test of Essential Academic Skills content guidelines. They were built to accurately mirror the real exam's structure, coverage of topics, difficulty, and types of questions.

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TEAS Test of Essential Academic Skills Science - Free Test Sample Questions

What benefit can a fungus have to an ecosystem?





Correct Answer:
fungi serve as decomposers.


fungi play a critical role in ecosystems as decomposers, which is one of their most vital functions for maintaining ecological balance. as decomposers, fungi break down dead organic matter, including fallen leaves, dead trees, and other plant material, as well as animal corpses and waste. this process is crucial because it recycles nutrients that are trapped in organic matter back into the soil, making them available for use by plants and other organisms. this nutrient cycling is essential for the productivity and health of the ecosystem.

fungi, along with bacteria, are among the principal decomposers in our environment. they have a unique capability to decompose lignin and cellulose, which are the main components of wood and plant fibers. by breaking down these complex substances, fungi contribute significantly to the carbon cycle, helping to convert carbon stored in organic materials into carbon dioxide, which is then released back into the atmosphere and used by plants during photosynthesis.

the decomposition process carried out by fungi not only recycles nutrients but also helps in the detoxification of the environment. some fungi have the ability to absorb and neutralize pollutants and toxins in the soil, including heavy metals and pesticides, thus reducing environmental contamination and promoting healthier ecosystems.

however, it is important to note that not all fungi are beneficial to ecosystems. some fungi are pathogenic to plants and animals, including humans, causing diseases that can impact agricultural productivity and biodiversity. despite this, the overall role of fungi as decomposers is predominantly beneficial, highlighting their importance in ecological sustainability and health.

in summary, fungi as decomposers play an indispensable role in ecosystems by breaking down dead organic matter, recycling nutrients, aiding in the carbon cycle, and detoxifying the environment. their ability to decompose complex organic substances makes them key players in maintaining the balance and productivity of ecosystems around the world.