Keystone

What is a keystone species?

• A species that is most abundant in an ecosystem.

• A species that plays a critical role in maintaining the structure of an ecological community.

• A species that has no predators in its ecosystem.

• A species that can live in a variety of ecosystems.

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

• Cattle

• Sea otter

• Grass

• Mosquito

In a food chain, what is the primary source of energy?

• Carnivores

• Herbivores

• Decomposers

• The Sun

Why are keystone species important for biodiversity?

• They are the most numerous species in their ecosystems.

• They provide food for all other species.

• They help to maintain the structure and integrity of the ecosystem.

• They have no predators, ensuring their survival.

What happens to the savanna if elephants are not present?

• It becomes a forest.

• It becomes a desert.

• It becomes a lake.

• It becomes a mountain.

Match the underlined word with its definition: biodiversity

• large variety

• species that naturally lives in a space

• chain reaction

• to do well

• eats dead things