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Important Questions

Ecosystem

Himachal Pradesh Board · Class 12 · Biology

Most important questions from Ecosystem for Himachal Pradesh Board Class 12 Biology board exam 2026. MCQs, short answer, and long answer questions with marks.

44 questions40 flashcards5 concepts

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A diagram illustrating the interaction between biotic (producers, consumers, decomposers) and abiotic (sunlight, water, soil, temperature, air) components within an ecosystem.
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44 Questions·
multiple choicemultiple correct

Sample Questions

1multiple correct

Which of the following are examples of terrestrial ecosystems?

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Forest, Grassland, Desert

Terrestrial ecosystems are land-based ecosystems. Forest, grassland, and desert are examples of terrestrial ecosystems, while pond and lake are aquatic ecosystems.

2multiple correct

Which of the following processes are involved in decomposition?

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Fragmentation, Leaching, Catabolism

Decomposition involves fragmentation (breaking into smaller pieces), leaching (water-soluble nutrients going into soil), and catabolism (breakdown by enzymes). It also includes humification and mineralisation.

3multiple choice

The 10% rule in energy transfer means:

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Only 10% of energy is transferred from one trophic level to the next

The 10% rule states that when energy flows from one trophic level to the next, only about 10% of the energy is transferred. The remaining 90% is lost as heat, used in metabolism, or remains unconsumed.

4multiple choice

What is the raw material for decomposition called?

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Detritus

Detritus consists of dead plant remains (leaves, bark, flowers) and dead animal remains including fecal matter. This forms the raw material that decomposers break down during decomposition.

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Frequently Asked Questions

What are the important topics in Ecosystem for Himachal Pradesh Board Class 12 Biology?
Ecosystem covers several key topics that are frequently asked in Himachal Pradesh Board Class 12 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in Ecosystem — Himachal Pradesh Board Class 12 Biology?
Understand the core concepts first, then work through the 44 practice questions available for this chapter. Revise formulas and definitions regularly, and use flashcards for quick recall before the exam.
How many important questions are there in Ecosystem?
There are 44 practice questions available for Ecosystem. These cover multiple question types including MCQs, short answer, and long answer questions.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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All 13 chapters — Himachal Pradesh Board Class 12 Biology Important Questions

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