Energy Flow

In the food chain pictured, what type of organism is the bird? (a)  

• producer
• primary consumer
• secondary consumer
• tertiary consumer

Which of the following has the largest population in the Indian River Lagoon system?

• Crab

• Egret

• Flounder

• Phytoplankton

What is the primary source of energy for the ecosystem pictured above?

• Grass and Green plants

• Hawks and Deer

• Tadpoles and Fish

• Sun

How much energy is available to be passed on to the next level in a food web? (a)  

• 100%
• 10%
• 50%
• 75%

The diagram below shows a desert food web.

How will a large decrease in the number of rats impact the food web shown above?

• There will be an increase in the number of ants, tarantulas, and snakes.

• There will be an increase in the number of snakes, coyotes, and hawks.

• There will be a decrease in the number of snakes, coyotes, and hawks.

• There will be a decrease in the number of cacti and sagebrush plants.

Analyze the food web above. Which animal receives the most energy originally produced by the plants in the food web?

• rabbit

• frog

• owl

• snake

Which of the following statements best describes the flow of energy in the energy pyramid above?

• As you go higher in the pyramid, the amount of energy increases.

• There is less energy in a producer level than a consumer level.

• There is no energy above the level of producers in the system.

• Each group receives only a small amount of the energy from the level below it.

Only (a)   of energy is given to the next trophic level.   (b)   is eliminated as waste heat.

• 10%, 90%
• 90%, 10%
• 25%, 75%
• 75%, 25%

fly → frog → snake → alligator

The arrows indicate the direction of the flow of

• energy.

• water

• oxygen

• carbon dioxide

In the energy pyramid below, which organism has the least amount of energy available?

• Producers
• Herbivores
• Carnivores
• Top Predator