Trophic Levels and Food Webs Answers

Which shows the correct order of increasing trophic level, from producer to tertiary consumer?

Less than 0.1% of the energy in a food chain generally makes it from the sun to quaternary consumers.

A quaternary consumer species would be expected to have a smaller population than a secondary consumer species.

Scientists use different types of models to analyze the structure of ecosystems. Which characteristic is seen in a biomass pyramid, but not in a numbers pyramid?

Organisms produce their own energy or provide energy for other organisms in a food chain. Yellowfin tuna, or Thunnus albacores, are large sport fish found in tropical and subtropical waters around the world. They typically school under objects such as boats or patches of driftwood for protection from predators. Schooling under these structures also provides yellowfin tuna with easy access to smaller fish that may be foraging for food. Photo by NOAA Which trophic level does yellowfin tuna fill in a food chain?

It is advantageous for a predator to prey exclusively on a single prey species.

The elimination of a predator has no negative impacts on that predator’s prey species.

Which class of organisms gather their energy directly from the sun?

In a trophic pyramid, which of the following populations would be found in the trophic level directly above the producers?

Energy flow in an ecosystem is best represented by _______.