Trophic Levels and Food Webs Answers

All animals are _______.

If a predator is eliminated from an ecosystem its prey’s population will likely _______.

Which is not an advantage of using the Pyramid of Energy?

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

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

Which organism gathers its energy directly from the sun?

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

Which of the following is an autotroph?

Organisms produce their own energy or provide energy for other organisms in a food chain. Many different organisms can be found in the Amazon rainforest in South America. Organisms in this biome include a variety of trees, plants, insects, fish, birds, reptiles, and mammals. The jaguar and anaconda are among the largest predators found in the Amazon. Photo by Trisha M. Shears Photo by US Fish and Wildlife Service Which trophic level do anacondas and jaguars fill in the Amazon rainforest?

Energy flow in an ecosystem is best represented by _______.

The initial period of population growth for a species in an environment is _______.

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?

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?

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

The main producers in aquatic environments are _______.

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

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

Which of the following has the most biomass?

Producers are always the highest level in trophic pyramids. Please select the best answer from the choices provided

Which of the following would not reduce the carrying capacity of an ecosystem for a particular prey species?