Multiple Choice
Radiolarians secrete glassy exoskeletons made of which of the following?
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1. Introduction to Biology
Introduction to Biology
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Which group of organisms is always found at the base of a food chain or food web?
A
Producers (autotrophs)
B
Secondary consumers (carnivores)
C
Decomposers
D
Primary consumers (herbivores)
Verified step by step guidance1
Understand the concept of a food chain or food web: A food chain represents the flow of energy through an ecosystem, starting with organisms that produce energy and moving through various levels of consumers. A food web is a more complex representation of interconnected food chains.
Identify the role of producers (autotrophs): Producers are organisms, such as plants, algae, and some bacteria, that can create their own food through processes like photosynthesis or chemosynthesis. They convert sunlight or chemical energy into usable energy, forming the base of the food chain.
Recognize the role of primary consumers (herbivores): These organisms feed directly on producers, obtaining energy from the plants or algae they consume. They occupy the second level of the food chain.
Understand the role of secondary consumers (carnivores): These organisms feed on primary consumers, obtaining energy from herbivores. They occupy higher levels in the food chain.
Clarify the role of decomposers: Decomposers, such as fungi and bacteria, break down dead organic matter and recycle nutrients back into the ecosystem. While essential, they are not part of the energy flow hierarchy in the food chain's base.
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