Food Chains and Energy

Elodea is an autotrophic organism which produces sugars at the bottom of some freshwater food chains. Elodea would best be classified as - 

• producers
• herbivores
• carnivores
• omnivores

Horses eat grasses and other plants in order to gain their nutrition.  Horses would best be classified as - 

• producers
• herbivores
• carnivores
• omnivores

Which organism in this food chain is a producer?

• Fish
• Grass
• Grasshopper
• Hawk

Which organism in this food chain is a primary consumer?

• Fish
• Grass
• Grasshopper
• Hawk

Which organism in this food chain is a secondary consumer?

• Fish
• Grass
• Grasshopper
• Hawk

In this food pyramid, which level has the greatest amount of energy?

• Producers
• Primary Consumers
• Secondary Consumers
• Tertiary Consumers

A series of interrelated food chains in a given ecosystem is called a ______________.

• trophic level
• food pyramid
• predator-prey relationship
• food web

In the food web shown, who is the secondary consumer?

• grass

• mouse

• rabbit

• fox

An organism that lives by breaking apart dead organic matter into simpler parts is...

• scavenger
• consumer
• decomposer
• carnivore

Which level of an energy pyramid has the largest populations of organisms?

• Producers

• Primary Consumers

• Secondary consumers

• Tertiary Consumers