DU Midterm Review #1

Front

What is secondary succession?

Back

Secondary succession is the process of regrowth in an ecosystem after a disturbance, such as a forest fire, where soil and some organisms still remain.

Front

Which factor does NOT affect biodiversity in an ecosystem?

Back

Soil composition does NOT affect biodiversity; factors like genetic variation, habitat destruction, and climate change do.

Front

What process is crucial for the carbon cycle?

Back

Photosynthesis is crucial for the carbon cycle as it allows plants to convert carbon dioxide into organic matter.

Front

What is a prescribed burn?

Back

A prescribed burn is a controlled fire created by experts to clear fire fuel and manage ecosystems.

Front

Which organism does NOT conduct nitrogen fixation?

Back

Humans do NOT conduct nitrogen fixation; it is primarily done by nitrogen-fixing bacteria.

Front

Define primary succession.

Back

Primary succession is the development of an ecosystem in an area where no soil exists, such as after a volcanic eruption.

Front

What is biodiversity?

Back

Biodiversity refers to the variety of life in a particular habitat or ecosystem, including the number of species and genetic diversity.

Front

Explain the role of decomposers in an ecosystem.

Back

Decomposers break down dead organic matter, returning nutrients to the soil and supporting plant growth.

Front

What is the significance of the nitrogen cycle?

Back

The nitrogen cycle is significant because it recycles nitrogen in various forms, making it available for living organisms.

Front

What is an ecosystem?

Back

An ecosystem is a community of living organisms interacting with their physical environment.