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Chapter 1: The Living World
Biodiversity; Need for classification; three domains of life; taxonomy and systematics; concept of species and taxonomical hierarchy; binomial nomenclature.
17
Chapter 2: Biological Classification
Five kingdom classifications; Salient features and classification of Monera, Protista and Fungi; Lichens, Viruses and Viroids.
28
Chapter 3: Plant Kingdom
Classification into major groups; Features and examples of Algae, Bryophyta, Pteridophyta, Gymnospermae (Excluded: Angiosperms, Plant Life Cycle & Alternation of Generations).
24
Chapter 4: Animal Kingdom
Salient features and classification: Non-chordates up to phyla level and chordates up to class level; examples of each. (No live specimens to be displayed).
34
Chapter 5: Morphology of Flowering Plants
Morphology of root, stem, leaf, inflorescence, flower, fruit, seed; description of family Solanaceae.
46

Lichens as Pollution Indicators

Lichens as Pollution Indicators — CBSE Class 11 Biology 30 MCQ Quiz

Unit 1: Diversity of Living Organisms — Chapter 2: Biological Classification

CBSE Class 11 — Subject: Biology

30:00

Questions: 30 | Duration: 30 minutes

1. Why are lichens considered good indicators of air pollution?

They grow only near factories They absorb nutrients and pollutants directly from air and are sensitive to pollutants They repel pollutants They produce pollutants

2. Which pollutant is most commonly monitored using lichens?

Sulphur dioxide (SO2) Ozone only Nitrogen gas (N2) Helium

3. A decline in lichen diversity in an area most likely indicates:

Increased rainfall Improved soil quality Increased air pollution (e.g., SO2) More sunlight

4. Which property makes lichens accumulate heavy metals from the atmosphere?

Presence of root system High surface area and direct absorption from air and precipitation Active filtration via stomata Photosynthesis

5. Which lichen response is commonly used as an early warning of sulphur dioxide pollution?

Increase in foliose lichens Appearance of new crustose species Rapid growth of fruticose lichens Decline or disappearance of sensitive lichen species

6. Which lichen growth form is generally most sensitive to air pollution?

Crustose Fruticose (often most sensitive) Foliose Leprose

7. Lichens are used as biomonitors because they:

Integrate pollutant load over time in their tissues Change colour immediately on pollutant exposure Grow only near polluted sites Eliminate pollutants by metabolism

8. Which analytical method is commonly used to measure pollutant concentrations accumulated by lichens?

Light microscopy only pH paper Visual estimation only Chemical analysis (e.g., atomic absorption spectroscopy, ICP-MS)

9. Which of the following is NOT a reason lichens are good pollution indicators?

They absorb substances from air directly They are too mobile and move with the wind They lack roots and rely on atmospheric inputs They show species-specific sensitivity to pollutants

10. What happens to sensitive lichen species near industrial areas with high SO2 levels?

They increase in abundance They change to foliose form They decline or disappear They become invasive

11. Which pollutant can cause bleaching or reduced photosynthetic activity in lichens?

Carbon dioxide Sulphur dioxide (SO2) Nitrogen gas (N2) Argon

12. Which term describes lichens that are tolerant of polluted air and often found in urban zones?

Sensitive species Indicator species Epiphytic species only Tolerant or nitrophilous species

13. What is meant by the term 'bioaccumulation' in lichens?

Gradual accumulation of pollutants (e.g., heavy metals) in lichen tissues over time Rapid loss of pollutants Prevention of pollutant entry Immediate breakdown of pollutants

14. Which type of lichen survey compares lichen species composition across sites to assess air quality?

Genetic survey Soil sampling Lichen diversity and community structure survey (biological monitoring) Water quality survey

15. Which simple field test can sometimes indicate SO2 pollution effects on lichens?

Measuring lichen chlorophyll with a meter only Observing decline or absence of sensitive lichen species near pollution sources Counting rhizines on thalli Testing for soil pH under lichens

16. Lichens used in monitoring of heavy metals are often sampled and analysed for:

Concentrations of metals like lead (Pb), cadmium (Cd) and mercury (Hg) Levels of atmospheric oxygen only Amount of soil under lichens Photosynthetic rate only

17. Which statement best describes nitrophilous lichens?

Lichens that avoid nitrogen-rich areas Species intolerant to nitrogen pollution Lichens that tolerate or thrive in nitrogen-rich (polluted) environments Lichens that fix atmospheric nitrogen only

18. An increase in nitrophilous lichen species near roadsides indicates:

Decreased vehicle emissions Elevated nitrogenous pollutants (NOx, NH3) from traffic Improved air quality overall Higher rainfall

19. Which lichen-based method estimates recent changes in air quality by comparing lichen cover over time?

Repeat photographic or quadrant surveys of lichen cover and species Soil carbon dating Tree ring analysis only Water isotope analysis

20. Which factor besides pollution influences lichen distribution and must be controlled for in surveys?

Presence of large mammals only Lunar phase Substrate (rock/bark), humidity and light Magnetic field

21. Which human activity would most directly reduce lichen diversity in an urban area?

Planting native trees Increasing industrial emissions and vehicle exhaust Setting up community gardens Cleaning air filters

22. Which lichen response is useful to detect atmospheric ozone (O3) damage?

Thallus bleaching and reduced photosynthetic pigments Increased growth rate Production of rhizines Fruiting body formation

23. When using lichens as indicators, why is species-level identification important?

All lichens respond exactly the same to pollutants Species identification is irrelevant Different species vary in sensitivity; accurate interpretation needs species-specific data Only genus-level data matter

24. Long-term monitoring of lichens near a factory showed increasing heavy metal levels in lichen tissues. This suggests:

Decrease in factory emissions Persistent or increasing atmospheric deposition of heavy metals Improvement in air quality Reduction in vehicular traffic

25. Which control is essential when comparing lichen samples from two sites for pollutant analysis?

Use different lichen species at each site Collect samples at different heights randomly Use the same lichen species and similar exposure/substrate at both sites Analyze only soil samples

26. Which monitoring approach uses lichen diversity indices to rate air quality?

Ecological indices and species richness metrics Satellite remote sensing only Tree ring analysis Water chemistry indices

27. Which of the following is an advantage of using lichens over active air samplers?

Lichens give real-time hourly data Lichens integrate pollutant exposure over long periods without power requirements Lichens measure only water pollutants Lichens can be deployed in deep sea

28. Which pollutant accumulation pattern in lichens would suggest local point-source pollution?

Uniform levels across a wide area Higher levels in remote areas only Elevated concentrations close to the suspected source with decreasing levels away from it No accumulation anywhere

29. Citizen science projects using lichens commonly ask volunteers to:

Perform chemical assays at home Photograph and record lichen species presence/absence at marked sites Harvest lichens for dye production Measure sea water salinity

30. Overall, lichens are valuable pollution indicators because they:

Eliminate pollution completely Grow only in polluted areas Accumulate pollutants, show species-specific sensitivity, and integrate air quality over time Do not respond to environmental change

Prepared fully as per NCERT syllabus — practice for CBSE Board & NEET-UG aspirants.

Titles

Lichens as Pollution Indicators MCQs — CBSE Practice Test
Pollution Indicators: Lichens 30-Question Timed Quiz (Class 11)
CBSE Class 11 Biology: Lichens as Indicators Quiz with Scoring
NEET-UG Prep: Lichens as Pollution Indicators MCQs Online
NCERT Quiz: Lichens as Pollution Indicators — Biology MCQs

Introduction Paragraph
The Lichens as Pollution Indicators MCQs practice test is based on the NCERT Class 11 Biology syllabus and focuses on the unique role of lichens in monitoring air quality. Sensitive to sulphur dioxide, heavy metals, and nitrogen oxides, lichens serve as natural bioindicators of pollution levels. This online quiz includes 30 exam-style questions in a 30-minute timed format, with automatic scoring and instant per-question feedback. Perfect for CBSE Class 11 Biology revision and NEET-UG preparation, the test helps students strengthen their understanding of ecological indicators, species sensitivity, and environmental monitoring. With concise explanations after submission, learners can quickly identify weak areas and improve exam performance.

Tags
CBSE Class 11 Biology MCQs, Lichens as pollution indicators quiz, NCERT aligned online practice test, Automatic scoring biology quiz, NEET UG lichens revision quiz, Timed 30 minute MCQ test, Per question feedback explanations, CBSE board exam biology practice

Keywords
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