02. Ecosystems, Energy Flow, and Biodiversity Online Quiz Questions

True or false: Unlike nutrients such as carbon and nitrogen, energy is not recycled within an ecosystem.

In the food-chain segment grass → grasshopper → frog, which arrow correctly represents energy transfer between the grasshopper and the frog?

True or false: An inverted biomass pyramid in an aquatic ecosystem can occur even though producers remain the original source of energy for the food web.

A coastal wetland absorbs storm water and reduces flooding in nearby communities. Which category of ecosystem service best describes this benefit?

Which three features can help biodiversity increase an ecosystem's resilience after a disturbance? Select all correct choices.

An ecosystem has a gross primary productivity of 20,000 kcal/m²/year, and its producers use 8,000 kcal/m²/year for respiration. What is the net primary productivity? Enter the value in kcal/m²/year.

Which statement best applies the 10% rule to energy transfer in a food chain?

Which three management actions are supported as ways to protect or improve ecosystem resilience? Select all correct choices.

What ecological term describes a situation in which multiple species can perform similar ecosystem functions, providing alternatives if one species declines?

Explain why a food web provides a more realistic representation of an ecosystem than a single food chain. Include one example of how a change in one population or resource could affect other organisms.

A biologist needs a comparison that will remain upright for every ecosystem because energy is lost at each trophic transfer. Which ecological pyramid should be used?

An ecosystem has a gross primary productivity of 20,000 kcal/m²/year, and its producers use 8,000 kcal/m²/year for respiration. What is its net primary productivity?

Which sequence correctly represents the direction of energy transfer in the food chain involving grass, grasshoppers, frogs, snakes, and hawks?

True or false: Unlike matter, energy flows through an ecosystem in one direction and is not recycled within the ecosystem.

Using the approximate 10% rule, if producers store 10,000 energy units, how many energy units are expected to be transferred to primary consumers? Enter the answer as a whole number without the unit.

A wetland reduces flooding by storing and slowing stormwater. Which ecosystem-service category does this benefit represent?

An aquatic ecosystem has an inverted biomass pyramid, with a larger standing biomass of zooplankton than phytoplankton. Which explanation best accounts for this pattern?

Which pair correctly identifies the two components of species diversity?