Energy flow Review Env

Why do higher trophic levels in most ecosystems contain fewer organisms than lower trophic levels?

• Energy available for use to the highest trophic level is small

• Energy available for use to the lowest trophic level is small.

• Energy available for use to the highest trophic level is large.

• Energy available for use to the highest and lowest trophic levels is the same.

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How much energy is lost at each trophic level?

• 10%

• 90%

• 50%

• none

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The diagram that shows many feeding relationships in an ecosystem is called a

• Energy Pyramid

• Food web

• Food Chain

• Biome

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Where is the greatest biomass found in a food web?

• producers like grass

• herbivores like cows

• carnivores like lions

• omnivores like racoons

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What do the ARROWS in the food chain represent?

• the direction the energy is moving

• the number of organisms

• smallest organisms

• the loss of energy

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If the plant in the food chain has 20,000 kcal of energy, how much is passed to the insect?

• 20,000

• 2000

• 200

• 20

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IF the owls were removed from the food chain, what would happen to the mouse population?

• Removing the owls would not affect the other organisms.

• The plant population would increase

• The mouse population would decrease

• The mouse population would increase

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_ flows through a food web and provides energy for each trophic level.

• Photosynthesis

• Carbon

• Energy

• Carbon

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If all of the plants were removed from a food web what would happen?

• Birds and grasshoppers would thrive

• Only the snakes would survive

• The food web would produce more bacteria to compensate.

• The food web would completely collapse

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From what do the algae, seaweed, and plankton are all

• plants

• animals

• resources

• biomes

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