Energy Transfer in Ecosystems

Front

An arctic food web is shown. Suppose that the lemming population is removed from the web. Which of the following would be a likely short-term effect of this change?

Back

The snowy owl population will decrease.

Front

What explains the difference in available energy in trophic levels of a desert ecosystem? Options: There is less energy in the producers because they are at the bottom. There is more energy in the producers because they provide energy for all the consumers in the ecosystem. There is more energy available in the tertiary consumers because they need the energy to hunt. There is more energy in the level containing the top predators because they are larger in size.

Back

There is more energy in the producers because they provide energy for all the consumers in the ecosystem.

Front

Read the following passage to answer the question that follows. Ducks and snails often eat grass and algae in freshwater ponds. The snails are eaten by mice and ducks. Foxes prefer to eat mice but will eat a duck if the opportunity arises. Which of the following food chains correctly represents the information in the passage?Options: snails --> algae --> mice --> fox, fox --> ducks --> mice --> algae, grass --> snails --> mice --> fox, fox --> duck

Back

grass --> snails --> mice --> fox

Front

In the food web provided, which organism is considered an omnivore? Options: Grasshopper, Frog, Mouse, Hawk

Back

Mouse

Front

If the grass has 100% of energy, how much does the secondary consumer get?

Back

1%

Front

What percent of energy moves on to each trophic level in a food chain?

Back

10%

Front

How many producers are in this image?

Back

3

Front

Where does the red tail hawk directly get his energy from? Options: Hare (rabbit), Red Fox, Lynx, White Spruce

Back

Hare (rabbit)

Front

Fungi, bacteria, and worms can all break down organic material. What is the correct name for these types of organisms?

Back

Decomposers

Front

An organism that must consume other organisms for nutrients.

Back

Consumer