Exam Review: Ecology & DNA Technology 2025

Front

What is mutualism?

Back

A type of symbiotic relationship where both species benefit from the interaction.

Front

What role do nitrogen-fixing bacteria play in ecosystems?

Back

They convert atmospheric nitrogen into a form that plants can use to make proteins.

Front

What is a primary consumer?

Back

An organism that eats producers (plants) in a food web.

Front

How do invasive species impact biodiversity?

Back

They decrease biodiversity by outcompeting native species for resources.

Front

What is the definition of a food web?

Back

A complex network of feeding relationships among organisms in an ecosystem.

Front

What is the difference between a producer and a consumer?

Back

Producers create their own food through photosynthesis, while consumers eat other organisms.

Front

What is the significance of decomposers in an ecosystem?

Back

Decomposers break down dead organic matter, recycling nutrients back into the soil.

Front

What is the role of photosynthesis in the ecosystem?

Back

Photosynthesis allows plants to convert sunlight into energy, producing oxygen and glucose.

Front

What is competition in ecology?

Back

Competition occurs when two or more species vie for the same resources in an ecosystem.

Front

What is the definition of biodiversity?

Back

Biodiversity refers to the variety of life in a particular habitat or ecosystem.