Ecological Sucession

What is the key difference between primary and secondary succession?

• Primary succession is faster than secondary succession.

• Primary succession happens after a forest fire, while secondary succession occurs after a volcanic eruption.

• Primary succession begins with bare rock, while secondary succession starts with existing soil.

• Primary succession starts with soil, while secondary succession starts with bare rock.

What is the role of pioneer species in primary succession?

• They prevent other species from colonizing the area.

• They compete with other species for resources.

• They create soil by breaking down rock and decomposing.

• They immediately form a climax community.

Which organisms are considered pioneers in primary succession?

• Shrubs and grasses

• Insects and fungi

• Hardwood trees

• Lichens and mosses

What is the term for the stable and mature stage of an ecosystem?

• Climax community

• Primary community

• Pioneer community

• Secondary community

What defines a climax community in an ecosystem?

• A community that is constantly changing and unstable.

• A mature and stable ecosystem that has reached equilibrium.

• An ecosystem dominated by pioneer species.

• A community with no biodiversity.

What is the ultimate goal of ecological succession?

• To prevent disturbances like fires or clear-cutting.

• To eliminate pioneer species from the ecosystem.

• To ensure all species have the same niche.

• To create a climax community that is mature and stable.

Why can two species not share the exact same niche in the same habitat for long?

• Because they will eventually merge into one species.

• Because one species will outcompete the other over time.

• Because they will both leave the habitat due to competition.

• Because they will stop reproducing altogether.

Why is biodiversity important for ecosystem stability?

• It reduces the number of species in an area.

• It ensures that ecosystems can recover from disturbances.

• It eliminates the need for limiting factors.

• It increases competition among species.

Which human activity is NOT a threat to biodiversity?

• Renewable energy adoption

• Pollution

• Deforestation

• Introducing invasive species

What does an organism's niche represent in an ecosystem?

• Its role or profession

• Its biodiversity level

• Its physical address

• Its population size