Multiple Choice
Which of the following correctly matches a phylum or class with its characteristic?
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1. Introduction to Biology
Introduction to Taxonomy
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In the context of ecological roles, is krill considered a producer?
A
Yes, krill are producers that perform photosynthesis.
B
No, krill are primary consumers that feed on phytoplankton.
C
Yes, krill produce energy through chemosynthesis.
D
No, krill are decomposers that break down dead organic matter.
Verified step by step guidance1
Understand the ecological roles: Producers are organisms that create their own energy, typically through photosynthesis (e.g., plants, algae) or chemosynthesis. Consumers, on the other hand, obtain energy by feeding on other organisms.
Identify the role of krill in the ecosystem: Krill are small crustaceans that feed on phytoplankton, which are microscopic producers. This means krill do not produce their own energy but rely on consuming producers.
Classify krill based on their diet: Since krill feed on phytoplankton, they are considered primary consumers. Primary consumers are organisms that directly consume producers in the food chain.
Eliminate incorrect options: Krill do not perform photosynthesis or chemosynthesis, so they are not producers. They also do not break down dead organic matter, so they are not decomposers.
Conclude the correct answer: Krill are primary consumers that feed on phytoplankton, making the correct answer 'No, krill are primary consumers that feed on phytoplankton.'
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