A large geographical area characterized by specific climate, flora, and fauna

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Fundamental Concepts of Ecology

Ecology

A comprehensive quiz covering key ecological principles, energy flow, and environmental interactions.

biology science nature

10 Questions Medium Ages 12+ Sep 9, 2026

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About this Study Set

This study set covers Ecology through 10 practice questions. A comprehensive quiz covering key ecological principles, energy flow, and environmental interactions. Every question includes the correct answer so you can learn as you go — pick any format above to get started.

Questions & Answers

Browse all 10 questions from the Fundamental Concepts of Ecology study set below. Each question shows the correct answer — select a study format above to practice interactively.

1 What is the primary source of energy for almost all ecosystems on Earth?

A Geothermal heat
B Solar radiation
C Chemical bonds in rocks
D Tidal energy

2 Which term describes an organism that can produce its own food using sunlight or chemical energy?

A Consumer
B Decomposer
C Autotroph
D Heterotroph

3 In a food web, which organisms are responsible for breaking down dead organic matter and recycling nutrients?

A Decomposers
B Apex predators
C Primary consumers
D Secondary producers

4 What is the 'carrying capacity' of an environment?

A The total amount of oxygen produced
B The maximum population size an environment can support
C The speed at which a species reproduces
D The total number of predators in an area

5 Which gas is removed from the atmosphere by plants during the process of photosynthesis?

A Nitrogen
B Oxygen
C Carbon dioxide
D Methane

6 What is a biome?

A A specific type of soil composition
B A large geographical area characterized by specific climate, flora, and fauna
C The population density of a single species
D The study of human impact on cities

7 Which level of biological organization consists of all living organisms in a specific area interacting with their physical environment?

A Population
B Community
C Biosphere
D Ecosystem

8 What is the relationship called when two species live in close physical contact, and both benefit?

A Parasitism
B Mutualism
C Commensalism
D Competition

9 Approximately what percentage of energy is typically transferred from one trophic level to the next in a food chain?

A 10%
B 25%
C 50%
D 90%

10 What defines a 'keystone species' in an ecosystem?

A A species that has a disproportionately large effect on its environment
B The species with the highest population count
C A species that only eats plants
D A species that is newly introduced to an area

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