Keystone Species Quiz

What is a keystone species?

• A species that is always a predator

• A species that holds a habitat together

• A species that is the largest in its habitat

• A species that is most plentiful in its habitat

What happens if a keystone species is removed from an ecosystem?

• The ecosystem remains unchanged

• The ecosystem becomes larger

• The ecosystem becomes more diverse

• The ecosystem's structure and biodiversity change

Which of the following is an example of a keystone predator?

• Sea otter

• Prairie dog

• Antarctic krill

• Saguaro cactus

What role do beavers play in their ecosystem?

• They are keystone prey

• They are ecosystem engineers

• They are mutualists

• They are keystone plants

How do sea otters help kelp forests?

• By eating kelp

• By spreading kelp seeds

• By controlling sea urchin populations

• By building dams

What is a trophic cascade?

• A chain reaction in an ecosystem

• A type of food chain

• A type of waterfall

• A type of plant growth

Which animal is known for creating underground colonies that support many other species?

• Bumblebee

• Prairie dog

• African elephant

• Gray wolf

What is a mutualist keystone species?

• A species that is the most abundant in its ecosystem

• A species that engages in vital interactions with another species

• A species that creates habitats

• A species that is always a predator