Understanding Food Webs and Ecosystems

What is a limitation of a food chain that a food web addresses?

• A food chain shows only one path of energy flow.

• A food chain is more complex than a food web.

• A food chain includes all organisms in an ecosystem.

• A food chain shows the exact number of organisms.

In a food web, what do the arrows represent?

• The lifespan of the organism.

• The speed of energy transfer.

• The size of the organism.

• The direction of energy flow.

Which of the following is a producer in the Arctic marine food web?

• Leopard seal

• Arctic cod

• Krill

• Phytoplankton

What role do krill play in the Arctic marine food web?

• Tertiary consumers

• Secondary consumers

• Primary consumers

• Producers

Which animals are considered tertiary consumers in the Arctic marine food web?

• Phytoplankton and krill

• Orca and baleen whale

• Penguin and leopard seal

• Krill and Arctic cod

How can a forest fire impact a food web?

• It has no effect on the ecosystem.

• It increases the number of producers.

• It decreases the number of primary consumers.

• It only affects tertiary consumers.

What might happen if humans remove a predator from an ecosystem?

• Overgrazing may occur due to increased primary consumers.

• The ecosystem becomes more balanced.

• The number of tertiary consumers increases.

• The number of primary consumers decreases.

Why is it important to protect biodiversity in an ecosystem?

• It maintains the balance and interconnectedness of the ecosystem.

• It reduces the number of producers.

• It ensures a single food chain.

• It increases the number of tertiary consumers.

What is the main purpose of a food web?

• To determine the lifespan of each organism.

• To identify the fastest animal in the ecosystem.

• To illustrate the flow of energy and interconnectedness in an ecosystem.

• To show the exact population of each species.

What is a key takeaway about food webs from the lesson?

• They are not affected by human actions.

• They highlight the importance of protecting ecosystems.

• They show only one path of energy flow.

• They are less complex than food chains.