ASBOG Practice Exam 2025 – Comprehensive All-in-One Guide to Ace Your Geology Licensure!

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Which of the following is an example of a biotic factor in a geological ecosystem?

The presence of minerals

The presence of vegetation

In a geological ecosystem, a biotic factor refers to any living component that affects other organisms within that ecosystem. Vegetation, which includes all types of plants, is a prime example of such a biotic factor. Plants play a crucial role in an ecosystem by providing food and habitat for various organisms, contributing to processes like photosynthesis, and influencing soil formation and erosion patterns.

In contrast, the presence of minerals, soil composition, and rock types are all abiotic factors, meaning they are non-living components of the environment. These abiotic elements can influence the types of vegetation that grow in an area, but they do not consist of living organisms themselves. Therefore, the presence of vegetation stands out as the only example of a biotic factor among the choices provided.

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Soil composition

Rock types

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