Ecosystems Introductory Quiz

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Questions and Answers

What is an ecosystem?

A group of organisms living in isolation from the environment
A structural and functional unit of ecology where living organisms interact with each other and the environment (correct)
A chain of interactions between organisms without any influence from the environment
A community of organisms interacting with each other but not with the environment

How do animals influence the movement of matter and energy in an ecosystem?

By not playing any role in the ecosystem's energy flow
By feeding on plants and on one another (correct)
By influencing only the quantity of plant biomass
By remaining isolated from the energy flows

What do decomposers do in an ecosystem?

Consume live plants and animals for energy
Prevent the release of carbon back to the atmosphere
Have no role in the ecosystem
Break down dead organic matter and release carbon back to the atmosphere (correct)

What controls the overall structure of an ecosystem?

External factors such as climate, parent material, and topography (A) Signup and view all the answers

How are ecosystems linked together?

Through nutrient cycles and energy flows (D) Signup and view all the answers

What is the role of animals in the movement of matter and energy in an ecosystem?

Animals play an important role in the movement of matter and energy through the ecosystem by feeding on plants and on one another. Signup and view all the answers

How do decomposers facilitate nutrient cycling in an ecosystem?

Decomposers facilitate nutrient cycling by breaking down dead organic matter and converting nutrients stored in dead biomass back to a form that can be readily used by plants and microbes. Signup and view all the answers

What are the biotic and abiotic components of an ecosystem?

The biotic components of an ecosystem include all the living organisms, while the abiotic components include the physical environment with which they interact. Signup and view all the answers

What are some examples of internal factors that control ecosystems?

Internal factors that control ecosystems include decomposition, root competition, shading, disturbance, succession, and the types of species present. Signup and view all the answers