Ecosystems mcq

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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?

To make their own food through photosynthesis Signup and view all the answers

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

Plants Signup and view all the answers

What effect does red tide algae have on marine life?

produces toxins that paralyze and kill fish Signup and view all the answers

Which of the following statements about food webs is true?

They consist of interconnected food chains Signup and view all the answers

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

can disrupt the balance and affect other species Signup and view all the answers

Which abiotic factor is essential for photosynthesis in plants?

Light Signup and view all the answers

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

Lion and zebra Signup and view all the answers

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

Decrease in prey population Signup and view all the answers

What role do decomposers play in the nutrient cycle?

They break down dead matter and return nutrients to the soil Signup and view all the answers

How does temperature affect cold-blooded animals?

Their activity level varies with the surrounding temperature Signup and view all the answers