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Energy Flow in Ecosystems Quiz

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Questions and Answers

What is the primary function of biogeochemical cycles in an ecosystem?

To maintain the balance of abiotic factors
To control the population of decomposers
To provide energy to consumers
To govern the circulation of essential elements (correct)

In the carbon cycle, what are the primary processes involved in the movement of carbon?

Fermentation, transpiration, and evaporation
Erosion, condensation, and precipitation
Denitrification, combustion, and sedimentation
Photosynthesis, respiration, and decomposition (correct)

Which of the following is a key role of bacteria in biogeochemical cycles?

Producing oxygen for plants
Serving as primary decomposers in aquatic ecosystems
Fixing nitrogen for use by organisms (correct)
Breaking down carbon dioxide in the atmosphere

How do human activities impact biogeochemical cycles?

By disrupting natural cycles and causing environmental issues (B) Signup and view all the answers

What does an ecological niche encompass in ecology?

The function and environmental conditions of a species within its habitat (C) Signup and view all the answers

What is the main difference between producers and consumers in an ecosystem?

Producers can generate their own food through photosynthesis, while consumers cannot. (B) Signup and view all the answers

What is the significance of the 10 percent law in the energy flow of an ecosystem?

It states that only about 10% of energy is passed on to the next trophic level, with the rest being lost as heat. (A) Signup and view all the answers

Why is energy flow in an ecosystem considered not 100% efficient?

Because some energy is lost as heat and not all absorbed energy is used. (A) Signup and view all the answers

How does a food web differ from a food chain in an ecosystem?

A food web is more complex and shows how various food chains intersect, while a food chain is a linear sequence. (B) Signup and view all the answers

Why do consumers need to obtain energy by consuming other organisms in an ecosystem?

Consumers cannot generate their own food through photosynthesis like producers. (D) Signup and view all the answers