Ecosystems mcq

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Questions and Answers

What is an ecosystem?

  • A place where only plants live
  • All the living and non-living things in an area and their interactions (correct)
  • Only the non-living parts of the environment
  • A community of only animals living together

Which of the following is an abiotic factor?

  • Plants
  • Animals
  • Soil (correct)
  • Microorganisms

What are decomposers?

  • Organisms that make their own food
  • Organisms that hunt and kill other animals
  • Organisms that break down dead matter (correct)
  • Organisms that compete for the same resources

In a food chain, what is the role of a producer?

<p>To make their own food through photosynthesis (B)</p> Signup and view all the answers

Which of the following is a biotic factor in an ecosystem?

<p>Plants (D)</p> Signup and view all the answers

What effect does red tide algae have on marine life?

<p>produces toxins that paralyze and kill fish (B)</p> Signup and view all the answers

Which of the following statements about food webs is true?

<p>They consist of interconnected food chains (B)</p> Signup and view all the answers

What can happen to an ecosystem if one species is removed?

<p>can disrupt the balance and affect other species (B)</p> Signup and view all the answers

Which abiotic factor is essential for photosynthesis in plants?

<p>Light (C)</p> Signup and view all the answers

Which of the following is an example of a predator-prey relationship?

<p>Lion and zebra (C)</p> Signup and view all the answers

Which factor is most likely to cause a decrease in the population of predators?

<p>Decrease in prey population (B)</p> Signup and view all the answers

What role do decomposers play in the nutrient cycle?

<p>They break down dead matter and return nutrients to the soil (C)</p> Signup and view all the answers

How does temperature affect cold-blooded animals?

<p>Their activity level varies with the surrounding temperature (C)</p> Signup and view all the answers

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