Ecosystems MCQs
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Which of the following is an example of an ecosystem?
- A. The plants, animals, and decomposers that inhabit an alpine meadow.
- B. A pond and all of the plant and animal species that live in it.
- C. The intricate interactions of the various plant and animal species on a savanna during a drought.
- D. Interactions between all of the organisms and their physical environment in a tropical rain forest.
- Correct Answer: Option D
Ecosystems are
- A. processors of energy and transformers of matter.
- B. processors of matter and transformers of energy.
- C. processors of matter and energy.
- D. transformers of matter but not of energy.
- Correct Answer: Option B
What is the most important role of photosynthetic organisms in an ecosystem?
- A. converting inorganic compounds into organic compounds
- B. absorbing solar radiation
- C. producing organic detritus for decomposers
- D. dissipating heat
- Correct Answer: Option A
Many homeowners mow their lawns during the summer and collect the clippings, which are then hauled to the local landfill. Which of the following actions would most benefit the local ecosystem?
- A. Allow sheep to graze the lawn and then collect the sheepʹs feces to be delivered to the landfill.
- B. Collect the lawn clippings and burn them.
- C. Either collect the clippings and add them to a compost pile, or donʹt collect the clippings and let them decompose into the lawn.
- D. Collect the clippings and wash them into the nearest storm sewer that feeds into the local lake.
- Correct Answer: Option C
Of the following pairs, which are the main decomposers in a terrestrial ecosystem?
- A. fungi and prokaryotes
- B. plants and mosses
- C. insects and mollusks
- D. mammals and birds
- Correct Answer: Option A
Which of the following are responsible for the conversion of most organic material into CO2, which can be utilized in primary production?
- A. autotrophs
- B. detrivores
- C. primary consumers
- D. herbivores
- Correct Answer: Option A
Which of the following terms encompasses all of the others?
- A. heterotrophs
- B. herbivores
- C. carnivores
- D. primary consumers
- Correct Answer: Option A
To recycle nutrients, the minimum an ecosystem must have is
- A. producers.
- B. producers and decomposers.
- C. producers, primary consumers, and decomposers
- D. producers, primary consumers, secondary consumers, and decomposers.
- Correct Answer: Option B
A cowʹs herbivorous diet indicates that it is a(n)
- A. primary consumer.
- B. secondary consumer.
- C. decomposer
- D. autotroph
- Correct Answer: Option A
How are matter and energy used in ecosystems?
- A. Matter is cycled through ecosystems; energy is not.
- B. Energy is cycled through ecosystems; matter is not.
- C. Energy can be converted into matter; matter cannot be converted into energy.
- D. Matter can be converted into energy; energy cannot be converted into matter.
- Correct Answer: Option A