Nutrient Cycle/Intro to Ecology HW quiz

What is the original source of almost all energy in most ecosystems?

• carbohydrates
• sunlight
• water
• carbon

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An organism that produces its own food supply from inorganic compounds is called a(an)

• heterotroph
• consumer
• detritivore
• autotroph

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A collection of organisms that belong to different populations but all live in the same area and interact with one another.

• Population
• Ecosystem
• Community
• Ecosphere

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What is one of the most important processes that removes carbon from the atmosphere? 

• photosynthesis
• cellular respiration
• erosin
• soil respiration

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Matter on Earth is limited, so it must be used ____________________________.

• only once
• over and over again
• by only animals
• at night only

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Organisms in this category get their energy from both plant and animal matter. 

• Producer
• Carnivore
• Detrivore
• Omnivore

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After the first trophic level - what percentage of energy is available  to each of the following levels?

• 100%
• 90%
• 10%
• 8.5%

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These organisms break down organic matter and release it back into the environment. 
Ex: Bacteria, Fungi

• Carnivores
• Omnivores
• Detritivores
• Decomposers

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Biotic and Abiotic factors that make up an environment

• Population
• Biome
• Ecosystem
• Community

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_{If the plant has 14,000 J, how much will the Eagle get?}

• 140 J
• 14,000 J
• 14 J
• 1.4 J

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