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CBSE Class 8  >  Class 8 Test  >  Year 8 Biology (Cambridge)  >  Test: Ecosystems - Class 8 MCQ

Ecosystems - Free MCQ Practice Test with solutions, Class 8 Year 8 Biology


MCQ Practice Test & Solutions: Test: Ecosystems (10 Questions)

You can prepare effectively for Class 8 Year 8 Biology (Cambridge) with this dedicated MCQ Practice Test (available with solutions) on the important topic of "Test: Ecosystems". These 10 questions have been designed by the experts with the latest curriculum of Class 8 2026, to help you master the concept.

Test Highlights:

  • - Format: Multiple Choice Questions (MCQ)
  • - Duration: 20 minutes
  • - Number of Questions: 10

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Test: Ecosystems - Question 1
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What is bioaccumulation?

Detailed Solution: Question 1

Bioaccumulation refers to the process by which organisms absorb and store toxins from their environment at a rate faster than they can eliminate them.

Test: Ecosystems - Question 2
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Which of the following best describes a food chain?

Detailed Solution: Question 2

A food chain is a linear sequence of organisms through which nutrients and energy pass as one organism eats another.

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Test: Ecosystems - Question 3
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Why are top predators often most affected by bioaccumulation?

Detailed Solution: Question 3

Top predators are most affected by biomagnification because they are at the end of the food chain and accumulate toxins from all lower trophic levels, leading to higher concentrations of toxins in their bodies.

Test: Ecosystems - Question 4
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What is the main difference between bioaccumulation and biomagnification?

Detailed Solution: Question 4

The main difference is that bioaccumulation occurs within an individual organism, while biomagnification refers to the increase in toxin concentrations as you move up through trophic levels in a food chain.

Test: Ecosystems - Question 5
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Which of the following is an example of a primary consumer?

Detailed Solution: Question 5

A primary consumer is an organism that eats producers (plants). Rabbits eat grass, making them primary consumers.

Test: Ecosystems - Question 6
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In a food chain, what role do producers play?

Detailed Solution: Question 6

Producers, such as plants, produce energy from sunlight through photosynthesis, forming the base of the food chain.

Test: Ecosystems - Question 7
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Which of the following substances is most likely to bioaccumulate in a food chain?

Detailed Solution: Question 7

Mercury is a heavy metal that is not easily broken down or excreted, making it likely to bioaccumulate in a food chain.

Test: Ecosystems - Question 8
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How can bioaccumulation affect human health?

Detailed Solution: Question 8

Bioaccumulation can lead to the accumulation of harmful toxins in the human body, which can cause various health issues such as neurological damage and cancer.

Test: Ecosystems - Question 9
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Which of the following is a common effect of biomagnification in aquatic ecosystems?

Detailed Solution: Question 9

Biomagnification often results in higher concentrations of toxins in top predators in aquatic ecosystems, affecting their health and survival.

Test: Ecosystems - Question 10
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What is the primary source of toxins that lead to bioaccumulation in ecosystems?

Detailed Solution: Question 10

Human activities, such as industrial pollution, are the primary sources of toxins that lead to bioaccumulation in ecosystems, introducing harmful substances into the environment.

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About this Class 8 Practice Test

This test contains 10 MCQs on Ecosystems with detailed solutions for each question. It is part of the Year 8 Biology (Cambridge) course on EduRev, designed to align with the current Class 8 syllabus. Each solution explains not just the correct answer but also gives you an understanding of the topic — not just to attempt the question but also help you prepare for the exam with practice.

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If you found this Ecosystems MCQ Test helpful, you can further enhance your Class 8 preparation with in-depth courses on EduRev, for all the subjects and topics available in Year 8 Biology (Cambridge) course. The course offers:
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