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Important Questions

Population Ecology

ICSE · Class 12 · Environmental Science

Most important questions from Population Ecology for ICSE Class 12 Environmental Science board exam 2026. MCQs, short answer, and long answer questions with marks.

70 questions44 flashcards5 concepts

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70 Questions·
multiple choicemultiple correct

Sample Questions

1multiple correct
1 marks

Which of the following can increase population size?

Show answer

Births, Immigration

Births and immigration increase population size, while deaths and emigration decrease it.

2multiple choice
1 marks

What does immigration mean in population ecology?

Show answer

Permanent addition of individuals to a population by movement from other locations

Immigration is the number of individuals permanently added to a population by movement from other locations.

3multiple choice
1 marks

What does emigration do to population size?

Show answer

It decreases population size as individuals permanently leave

Emigration causes population size to decrease because individuals permanently leave the population.

4multiple choice
1 marks

What is the correct expression for change in population size?

Show answer

N_t = N_0 + (B + I) - (D + E)

The change in population size is calculated as original population plus births and immigration minus deaths and emigration.

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Frequently Asked Questions

What are the important topics in Population Ecology for ICSE Class 12 Environmental Science?
Population Ecology covers several key topics that are frequently asked in ICSE 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 Population Ecology — ICSE Class 12 Environmental Science?
Understand the core concepts first, then work through the 70 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 Population Ecology?
There are 70 practice questions available for Population Ecology. 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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