Trophic Levels and Food Webs Answers

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?

Energy flow in an ecosystem is best represented by _______.

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

All animals are _______.

Which of the following is an autotroph?

Which of the following has the most biomass?

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

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

Which best describes the trophic level of an organism?

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

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

The main producers in aquatic environments are _______.

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

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?