Write one symptom of each of two diseases which might be caused if suspended particulate matter enters into the respiratory tract through inspiration. Construct the sequence of events when agricultural runoff is drained into water bodies. [2+3=5]
OR
Poaching is one of the main reasons behind the depletion of biodiversity-Prepare a list of any three such endangered wild animals resulting from it. Show the various methods of conservation of biodiversity with the help of a chart. [3+2=5]
WBBSE
Class X
Life Science
05 (b) Environmental Pollution
05 (d) Biodiversity and Its Conservation
05 Mark
2023
Symptoms of two diseases caused by suspended particulate matter:
- Asthma: Shortness of breath and wheezing due to inflammation and narrowing of airways.
- Bronchitis: Persistent cough with increased mucus production caused by inflammation of the bronchial tubes.
Sequence of events when agricultural runoff is drained into water bodies:
- Rainwater or irrigation runoff flows over agricultural fields, carrying soil particles, pesticides, fertilizers, and animal waste.
- These pollutants enter nearby streams, rivers, lakes, or ponds.
- Nutrients like nitrogen and phosphorus increase, causing eutrophication (overgrowth of algae).
- Algal blooms reduce oxygen in water, causing death of aquatic life.
- Contamination also affects drinking water quality and aquatic ecosystems.
Or
Three endangered animals due to poaching:
- Black rhinoceros
- African elephant
- Bengal tiger
Methods of conservation of biodiversity:
| Method | Description |
|---|---|
| Protected areas | Establishing National Parks and Sanctuaries to protect wildlife. |
| Species management | Captive breeding and rehabilitation to increase populations. |
| Education | Raising awareness about the importance of biodiversity. |
| Sustainable use | Using biological resources without harming the environment. |
| Research | Studying species and ecosystems to inform conservation efforts. |
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