LE Energy Flow Quiz

What do the arrows in the diagram represent?

• an increase in population

• the flow of energy

• the evolution of organisms

• ecological succession

Which statement correctly describes interactions between organisms in this ecosystem?

• Hawks are predators of insect-eating birds, but not of seed-eating birds.

• Hawks and snakes prey on both rabbits and grasshoppers.

• Rabbits and mice compete for both grasses and flower seeds.

• Grasshoppers and mice compete for grasses, but not flower seeds.

Which statement most accurately predicts the result of interfering with populations in the web?

• Removing the deer population will have little effect on the balance of the food web.

• Removing all the mountain lions from the food web will benefit the ecosystem.

• Removing the grasshopper and rabbit populations would cause the number of trees to decrease.

• Removing deer from the food web will affect the bark beetle and tree populations.

A factor not shown in the diagram that provides energy for living organisms is

• carbon dioxide

• the Sun

• water

• oxygen

The final consumers in many food webs are

• autotrophs

• herbivores

• hosts

• carnivores

A corn field includes corn plants, mice, hawks, and various insects, fungi, and bacteria. Which nutritional role is correctly paired with organisms that carry out that role?

• heterotrophs – corn and bacteria

• producers – insects and fungi

• consumers – mice and insects

• decomposers – hawks and bacteria

The chart below represents some of the events that occur during the cycling of nutrients in an ecosystem. Which organisms would most appropriately complete the chart when written in the circle at X?

• producers

• herbivores

• carnivores

• decomposers

The diagram represents an energy pyramid. The organisms found at the second trophic level of this pyramid would be

• producers

• carnivores

• herbivores

• decomposers

Which level of the pyramid is correctly paired with the type of organism that would most likely be found at that level in an ecosystem?

• Level D – producers

• Level C – carnivores

• Level B – herbivores

• Level A – decomposers

The diagram below represents a food pyramid in an ecosystem. The best explanation for the decrease in the amount of energy transferred to each succeeding level is that much of the energy is

• consumed by predators

• released as heat

• stored within inorganic materials

• used in photosynthesis