Biosphere III Test

Front

What is primary succession?

Back

Primary succession is the process of ecological change that occurs in an area where no soil exists, such as after a volcanic eruption or glacier retreat. It begins with pioneer species like lichens and mosses that help create soil.

Front

What is secondary succession?

Back

Secondary succession is the process of ecological change that occurs in an area where a disturbance has destroyed an existing community but left the soil intact, such as after a forest fire or flood.

Front

What is a keystone species?

Back

A keystone species is a species that has a disproportionately large effect on its environment relative to its abundance. For example, bees are considered a keystone species because they pollinate flowers that produce fruit, supporting the ecosystem.

Front

What is a climax community?

Back

A climax community is the final stable community of plants and animals in a particular area, which remains relatively unchanged until disrupted by an event such as fire or human activity.

Front

What are pioneer species?

Back

Pioneer species are the first organisms to colonize a barren environment in the process of primary succession. They help create conditions suitable for other species to thrive.

Front

What is an invasive species?

Back

An invasive species is a non-native organism that, when introduced to a new environment, can reproduce rapidly and outcompete native species, often leading to ecological harm.

Front

What role do lichens play in primary succession?

Back

Lichens are often the first organisms to colonize bare rock in primary succession. They help break down the rock and contribute to soil formation.

Front

What is the order of plant growth after a volcanic eruption?

Back

The order of plant growth after a volcanic eruption typically follows this sequence: Lichens → Grasses → Shrubs → Trees.

Front

How do bees contribute to their ecosystem?

Back

Bees contribute to their ecosystem by pollinating flowers, which leads to the production of fruits and seeds, supporting various other species in the food web.

Front

What is the difference between primary and secondary succession?

Back

Primary succession occurs in lifeless areas without soil, while secondary succession occurs in areas where a disturbance has destroyed an existing community but left the soil intact.