Trophic Levels

According to the image, what is the producer?

• plant

• insect

• mouse

• snake

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What are "producers" producing?

• the energy for the food chain

• the insects for the food chain

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The word "primary" means "first."

If that's true, what does primary consumer mean?

Hint: look carefully at the food chain!

• the first organism in a food chain

• the first organism that consumes something else for energy

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The efficiency of energy transfer from a lower trophic level to the next highest level is roughly

• 1%
• 10%
• 100%
• 1000%

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Trophic levels are represented by 

• squares
• circles
• pyramids
• lines

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In the energy pyramid here, how much of the energy in each level gets lost as heat or used by the organism for survival?

• 80%
• 90%
• 10%
• 20%

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The arrows in a food chain or web represents what?

• They point to the organism that is being eaten.
• It shows how sunlight flows within an ecosystem.
• They show what direction the energy is flowing between organisms. 
• They represent how water is transferred within a habitat.

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The process of plants using energy from the sun to create the first trophic level is called?

• Photosynthesis
• Chemosynthesis
• Cellular Respiratation
• Primary Producers

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_{If the amount of food or resources available increases, the carrying capacity for an animal.....}

• Stays the same

• Increases

• Decreases

• Fluctuates

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This is the largest number of individuals of a population that the environment can support...

• carrying capacity

• population crash

• lag phase

• mutualism

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