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AP Environmental Science — free MCQ practice

Choose from 45 questions across 1 subjects and 2 topics. Open any question for its answer and worked solution, or keep learning through bite-sized lessons and reviews with Quill.

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AP Environmental Science subjects

Biology (45)

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EcosystemsEcology and the Biosphere

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Ecologists work at four specific levels of study. What are those four?Read the answer and worked solution →What does an ecologist mean by a population?Read the answer and worked solution →Ants tend Karner blue butterfly larvae, and those larvae secrete a carbohydrate rich food for the ants. What is this relationship?Read the answer and worked solution →The Venus flytrap grows naturally only in a small part of North and South Carolina. What is such a species called?Read the answer and worked solution →

Worked practice questions

Ecologists work at four specific levels of study. What are those four?

  1. Organism, population, biome, ecosystem
  2. Cell, organism, population, community
  3. Population, community, biome, biosphere
  4. Organism, population, community, ecosystem
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Correct answer: D. Organism, population, community, ecosystem

1. The smallest level looks at one individual and how it fits its habitat. 2. Above that sits the population, all individuals of one species in one place. 3. Above that sits the community, the different species in an area and their interactions. 4. The widest level is the ecosystem, which adds the nonliving surroundings to the community. _Source: OpenStax Biology 1e (CC BY 4.0), Chs 44 and 46, section 44.1 The Scope of Ecology_

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What does an ecologist mean by a population?

  1. All species living in one habitat
  2. One species interbreeding in one area
  3. One species spread across the globe
  4. All animals feeding on one plant
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Correct answer: B. One species interbreeding in one area

1. A population is limited to a single species. 2. Its members live in the same area at the same time and can interbreed. 3. The boundaries may be natural, such as a river, or artificial, such as a road. 4. All the different species in an area together make a community, not a population. _Source: OpenStax Biology 1e (CC BY 4.0), Chs 44 and 46, section 44.1 The Scope of Ecology_

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Ants tend Karner blue butterfly larvae, and those larvae secrete a carbohydrate rich food for the ants. What is this relationship?

  1. Predation
  2. Parasitism
  3. Mutualism
  4. Competition
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Correct answer: C. Mutualism

1. Work out what each partner gets out of the arrangement. 2. The larvae survive better when ants tend them, so the larvae gain. 3. The ants receive a carbohydrate rich secretion, so the ants gain as well. 4. A long term coevolved relationship where both species benefit is mutualism. 5. In predation and parasitism only one partner gains, so neither name fits here. _Source: OpenStax Biology 1e (CC BY 4.0), Chs 44 and 46, section 44.1 The Scope of Ecology_

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  1. Choose a AP Environmental Science question and try to work out your answer.
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