Nutritional Relationships in Ecosystems Quiz

What is the primary role of producers in an ecosystem?

• To break down dead organisms
• To make their own food
• To consume other organisms
• To compete for resources

Which of the following best describes a food chain?

• A complex network of feeding relationships
• A single path of energy transfer
• A list of all organisms in an ecosystem
• A diagram showing only producers

What happens to energy as it moves through a food chain?

• It increases at each level
• It is completely transferred
• Some energy is lost as heat
• It becomes more concentrated

In a mutualistic relationship, what occurs?

• One organism benefits, the other is harmed
• Both organisms benefit
• Neither organism is affected
• One organism is unaffected

What is an example of competition in ecosystems?

• A lion hunting a zebra
• Two plants competing for sunlight
• Bees pollinating flowers
• A remora fish attaching to a shark

Why are tertiary consumers usually fewer in number than primary consumers?

• They have more energy
• They require less food
• They are at the top of the food chain
• They reproduce more quickly

What role do decomposers play in an ecosystem?

• They produce energy
• They consume primary consumers
• They break down dead organisms
• They compete for resources

How do food webs differ from food chains?

• Food webs show only producers
• Food webs are more complex and interconnected
• Food webs are simpler
• Food webs do not show energy flow

What is a potential consequence of removing a primary consumer from a food chain?

• Increased population of producers
• Decreased population of secondary consumers
• No effect on the ecosystem
• Increased competition among producers

Which of the following is an example of commensalism?

• A bee pollinating a flower
• A lion hunting a zebra
• A remora fish attaching to a shark
• Two plants competing for sunlight