food chains

A student claims that this food web represents a stable ecosystem. Which of the following answers are correct? Check all that apply

• The student is wrong, the food web is not stable.

• Since there are a number of different species in this ecosystem, the system is probably stable.

• There are producers and consumers in this food web, and their interactions would keep this ecosystem stable.

• Yes, it supports the conclusion because the more diversity there is in an ecosystem, the more stable it is.

Why removing the sea stars from the food web could result in the loss of the entire kelp ecosystem? (Choose all that apply)

• The kelp ecosystem would be destroyed. Snails would increase out of control since the only animal eating them was the sea stars.

• The snails and sea urchins would consume the kelp.

• The sea otters would be feeding more on large crabs since there are no sea stars. Soon, sea otters would run out of food.

• If sea stars are removed, the organisms in the other populations present will be affected. All of these populations are linked either directly or indirectly. With the sea stars gone and a reduced number of sea urchins, the ecosystem will be out of balance and likely disappear.

Describe the relationship represented by the arrows between squids and fishes.

• Fish can be predators of squid, and squid can be predators of fish.

• Each species can be both predator and prey.

• They can feed on each other.

• No choices are correct

The fox in this food web would be considered a:

• Tertiary Consumer
• Producer
• Secondary Consumer
• Primary Consumer

Which animal is a tertiary consumer?

• Jackal
• Wild Cat
• Lion
• Owl

A group of organisms from the food web that would be found at level X of the energy pyramid is the (check all that apply)

• owls

• deer

• trees

• crickets

What does a food web represent?

• All connections of energy flow throughout all organisms in a ecosystem.
• The specific ways that mutualism is carried out.
• A single pathway or energy flow between organisms. 
• How carnivores get their food. 

The largest group of organisms found in a food web would be:

• Primary Consumers
• Producers
• Decomposers
• Tertiary Consumers

What are animals called in a food chain?

• Producers
• Consumers
• Decomposers
• Plants

The diagram below represents relationships in

a community. After a pathogen reduced the

population of grasshoppers, the number of

mice increased, while the numbers of toads

and rabbits decreased. These changes in the community demonstrate that

• A) ecosystems are shaped by nonliving

  factors

• B) autotrophs convert solar energy into food

• C) grasshoppers are producers that are

  essential for ecosystem stability

• D) populations are linked with many others

  in the ecosystem