Ecosystem Dynamics and Energy Flow

What type of organism produces its own food?

• Consumer

• Heterotroph

• Producer

• Decomposer

Which term describes an organism that needs to feed on other organisms for energy?

• Autotroph

• Producer

• Heterotroph

• Decomposer

In a food chain, what do the arrows represent?

• The direction of population growth

• The direction of energy flow

• The direction of organism movement

• The direction of nutrient cycling

In an energy pyramid, which trophic level contains the most energy?

• Primary Consumers

• Secondary Consumers

• Producers

• Tertiary Consumers

If producers in an ecosystem have 5,000 kilocalories (Kcal) of energy, approximately how much energy would be stored by the primary consumers?

• 50 Kcal

• 500 Kcal

• 5,000 Kcal

• 50,000 Kcal

What is a likely consequence if a specific organism is removed from a simple food chain?

• The entire food chain will collapse immediately.

• Only the organisms that directly eat it will be affected.

• It can harm other organisms in the chain due to lack of food or overpopulation.

• The ecosystem will quickly adapt with no negative effects.

Which type of ecological model represents a more stable and resilient ecosystem?

• Food chain

• Energy pyramid

• Food web

• Trophic level

What is biodiversity?

• The total number of animals in an ecosystem.

• The variety of all types of organisms living in a given area.

• The amount of energy stored in an ecosystem.

• The number of different food chains in an ecosystem.

How does high biodiversity contribute to the sustainability of an ecosystem?

• It ensures that all organisms have only one food source.

• It makes the ecosystem more vulnerable to changes.

• It allows the ecosystem to recover more easily from disturbances.

• It reduces the overall energy flow within the ecosystem.

What is the primary role of decomposers in an ecosystem?

• To produce their own food using sunlight.

• To consume living plants.

• To break down dead organisms and return nutrients to the environment.

• To hunt and kill other animals for food.