Model Food Webs Practice Test

Food webs show interconnected feeding relationships in an ecosystem. In the food web model below, arrows show the direction of energy transfer (from the organism being eaten to the organism that gets the energy). Producers are the plants.

Model (arrows show energy transfer):

• Oak tree (producer) → Caterpillar
• Oak tree (producer) → Squirrel
• Berry bush (producer) → Squirrel
• Caterpillar → Robin
• Caterpillar → Lizard
• Robin → Hawk
• Lizard → Hawk
• Squirrel → Fox

Which claim about feeding relationships is incorrect based on the food web model?

Food webs show interconnected feeding relationships in an ecosystem. In the food web model below, arrows show the direction of energy transfer (from the organism being eaten to the organism that gets the energy). Producers are the plants.

Model (arrows show energy transfer):

• Phytoplankton (producer) → Zooplankton
• Phytoplankton (producer) → Snail
• Zooplankton → Minnow
• Snail → Sunfish
• Minnow → Sunfish
• Minnow → Heron
• Sunfish → Heron

Which statement about the food web model is supported by the arrows?