Multiple Choice
In an introduction to ecosystems, ecosystem services are commonly grouped into four major categories. Which option correctly lists these four categories?
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52. Ecosystems
Introduction to Ecosystems
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Which of the following best describes an ecosystem?
A
All the living organisms on Earth considered together, excluding their physical environment
B
A biological community of interacting organisms and their physical (abiotic) environment within a defined area
C
All the populations of a single species living in the same area
D
A group of different species that live in the same area but do not interact
Verified step by step guidance1
Step 1: Understand the term 'ecosystem' by breaking it down into its components: 'biotic' (living organisms) and 'abiotic' (non-living physical environment) factors.
Step 2: Recognize that an ecosystem includes both the biological community (all interacting living organisms) and their physical environment, which interact as a system.
Step 3: Compare the given options to see which one includes both living organisms and their physical environment interacting within a defined area.
Step 4: Eliminate options that mention only living organisms without their environment, or only a single species or non-interacting species.
Step 5: Conclude that the best description of an ecosystem is 'A biological community of interacting organisms and their physical (abiotic) environment within a defined area' because it encompasses both biotic and abiotic components and their interactions.
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