Multiple Choice
Which of the following is the largest internal organ in the human body?
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1. Introduction to Biology
Introduction to Biology
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In an ecosystem, what is a primary consumer?
A
An organism that produces its own food through photosynthesis
B
An organism that preys on other consumers
C
An organism that feeds directly on producers such as plants or algae
D
An organism that decomposes dead organic matter
Verified step by step guidance1
Understand the concept of trophic levels in an ecosystem: Producers (like plants and algae) are at the base of the food chain, as they create their own food through photosynthesis. Consumers are organisms that rely on other organisms for energy.
Define primary consumers: These are organisms that feed directly on producers. They are herbivores that consume plants or algae to obtain energy.
Differentiate primary consumers from other types of organisms: Primary consumers do not produce their own food (like producers), prey on other consumers (like secondary or tertiary consumers), or decompose dead organic matter (like decomposers).
Identify examples of primary consumers: Common examples include herbivores such as deer, rabbits, grasshoppers, and zooplankton that feed on plants or algae.
Relate primary consumers to energy flow in ecosystems: Primary consumers play a crucial role in transferring energy from producers to higher trophic levels, supporting the food web.
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