Multiple Choice
Which statement best describes how bacteria recycle matter in an ecosystem?
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26. Prokaryotes
Prokaryotes in the Environment
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What role do lichens play in the environment?
A
Lichens are symbiotic organisms that contribute to soil formation and nutrient cycling.
B
Lichens are primary producers that convert sunlight into energy.
C
Lichens are parasitic organisms that decompose dead organic matter.
D
Lichens are aquatic organisms that help in water purification.
Verified step by step guidance1
Understand that lichens are symbiotic organisms, meaning they consist of a partnership between a fungus and a photosynthetic partner, usually algae or cyanobacteria.
Recognize that lichens are important in soil formation. They can colonize bare rock surfaces, where they secrete acids that break down the rock into smaller particles, contributing to the formation of soil.
Acknowledge that lichens play a role in nutrient cycling. They can fix nitrogen, especially when cyanobacteria are involved, enriching the ecosystem with essential nutrients.
Identify that lichens are primary producers in their ecosystems. They use photosynthesis to convert sunlight into energy, providing a food source for other organisms.
Clarify that lichens are not parasitic or aquatic organisms. They do not decompose dead organic matter like fungi do, nor do they primarily live in water to aid in purification.
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