Ecosystem Roles and Food Chains

The video explains the concept of food chains and food webs, highlighting the interdependence of organisms in an ecosystem. It discusses the roles of producers, consumers, and decomposers, and the impact of disruptions in the food chain. The importance of conserving species to maintain ecological balance is emphasized, as even small changes can have significant ripple effects.

What is the primary role of plants in a food chain?

• They are secondary consumers.

• They are decomposers.

• They are primary consumers.

• They are producers.

What might happen if a key species like shrimp is removed from a food chain?

• The bears will have more food.

• The population of fish that eat shrimp will decrease.

• The food chain will remain unaffected.

• The population of fish that eat shrimp will increase.

How do food webs differ from food chains?

• Food webs do not include decomposers.

• Food webs only include producers and consumers.

• Food webs consist of multiple interconnected food chains.

• Food webs are simpler than food chains.

Which of the following is a primary consumer?

• A decomposer

• A herbivore

• A plant

• A carnivore

What is the role of decomposers in an ecosystem?

• They are primary producers.

• They break down dead organisms and recycle nutrients.

• They consume primary consumers.

• They produce energy from sunlight.

Which type of consumer eats both plants and animals?

• Omnivores

• Carnivores

• Decomposers

• Herbivores

What is a characteristic of parasites?

• They only eat plants.

• They live on the bodies of other organisms.

• They produce their own food.

• They decompose dead matter.

Why is it important to protect all species in an ecosystem?

• Small species do not affect the ecosystem.

• Every species plays a vital role in the food web.

• Only plants need protection.

• Only large animals are important.

What could be a consequence of a species going extinct?

• The food web will remain stable.

• There will be no impact on other species.

• It will only affect the extinct species.

• It could cause environmental chaos.

What is the main message regarding the extinction of species?

• Extinction has no real impact on ecosystems.

• Only large species matter in the food web.

• Extinction is a natural and unimportant process.

• The extinction of any species can have widespread effects.