Multiple Choice
Could an ecosystem function without decomposers? Why or why not?
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52. Ecosystems
Introduction to Ecosystems
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In an ecosystem, phytoplankton are _____.
A
primary consumers
B
secondary consumers
C
decomposers
D
primary producers
Verified step by step guidance1
Understand the role of phytoplankton in an ecosystem. Phytoplankton are microscopic organisms that live in aquatic environments and perform photosynthesis, converting sunlight into chemical energy.
Recall the definition of primary producers. Primary producers are organisms that produce their own food through photosynthesis or chemosynthesis, forming the base of the food chain.
Differentiate between the roles of primary consumers, secondary consumers, and decomposers. Primary consumers feed on primary producers, secondary consumers feed on primary consumers, and decomposers break down dead organic matter.
Identify that phytoplankton, as photosynthetic organisms, produce energy that supports other organisms in the ecosystem, classifying them as primary producers.
Conclude that phytoplankton are not consumers or decomposers because they do not feed on other organisms or break down organic matter; instead, they generate energy through photosynthesis.
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