Multiple Choice
In an introduction to ecosystems, an ecosystem consists of which of the following?
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52. Ecosystems
Introduction to Ecosystems
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Which of the following is an example of a biotic factor in an ecosystem?
A
Average annual temperature
B
Sunlight intensity
C
A population of bacteria decomposing leaf litter
D
Soil pH
Verified step by step guidance1
Understand the definition of biotic factors: these are living components of an ecosystem, such as plants, animals, fungi, and microorganisms.
Identify the options given and classify each as either biotic (living) or abiotic (non-living) factors.
Average annual temperature, sunlight intensity, and soil pH are all abiotic factors because they are non-living physical or chemical elements.
A population of bacteria decomposing leaf litter is a living organism interacting within the ecosystem, making it a biotic factor.
Therefore, the correct example of a biotic factor is the population of bacteria decomposing leaf litter.
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