Understanding Food Webs and Their Ecological Importance

What is a food web?

• A linear sequence of organisms showing feeding relationships

• A complex network of interconnecting and overlapping food chains

• A single food chain in an ecosystem

• A diagram showing only producers and consumers

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Which of the following is a producer in a food web?

• Vulture

• Fungi

• Phytoplankton

• Beetle

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What role do decomposers play in a food web?

• They produce energy from sunlight

• They consume primary consumers

• They break down organic materials into basic compounds

• They prey on secondary consumers

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What is the typical efficiency of energy transfer between trophic levels in a food web?

• 50%

• 25%

• 10%

• 75%

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How can changes in precipitation types affect marine food webs?

• By altering the roles of producers

• By changing the energy efficiency between trophic levels

• By impacting ocean currents

• By increasing the number of decomposers

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