Download SGBAU BSc 2019 Summer 2nd Sem Environmental Science Ecology n Environment Question Paper

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B.Sc. (Part—I) Semester—II Examination

ENVIRONMENTAL SCIENCE

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(Ecology and Environment)

Time : Three Hours | Maximum Marks : 80

Note :— ALL questions are compulsory.

1. (A) Fill in the blanks with appropriate words :
   1. __________ is a hotspot of Biodiversity in India.
   2. Parasitism is an example of __________ interspecific relationship.

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   3. __________ is a gaseous biogeochemical cycle.
   4. __________ is a climatic factor.


2. (B) Choose the correct alternative and rewrite the following sentences :
   1. __________ is an example of commensalism.
      1. Vanda (orchid)

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      2. Cuscuta
      3. Algae
      4. Fungi
   2. __________ is an analytic character of community.
      1. Abundance

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      2. Fidelity
      3. Quadrat
      4. Presence
   3. __________ is the reason for biodiversity loss.
      1. Forest fires

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      2. Conservation
      3. Natality
      4. Species diversity
   4. The ecological boundaries of the two different floristic composition is referred as __________
      1. Biodiversity

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      2. Ecotone
      3. Productivity
      4. Interspecific Relationship

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3. (C) Answer in one sentence :
   1. Define Xerosere.
   2. Define Food Web.
   3. Define Ecosystem.
   4. Define Phenology.

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2. Describe in brief :
   1. Scope of ecology.
   2. Climatic factors.
   3. Graphic sketch of “N” cycle.
   OR
   1. Biotic factors.

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   2. Significance of ‘P’ cycle.
   3. Sketch of *C’ cycle.

3. 1. Parasitism.
   2. Biotic potential.

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   3. Age structure.
   OR
   1. Predation.
   2. Natality and Mortality
   3. Mutualism.

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4. Describe in brief :
   1. Presence and constance.
   2. Phenology.
   3. Species diversity.
   OR
   1. Frequency.
   2. Community study by Quadrat method.

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   3. Dominance.

5. Describe forest ecosystem with its significance. OR Describe food chain in forest ecosystem

6. Describe the process of succession and causes of succession. OR Describe the concept of Productivity. How productivity is measured by chlorophyll, CO₂ and O₂ method ?

7. Explain in brief :
   1. Ecological indicators of soil

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   2. Types of biodiversity.
   3. Reasons for loss of biodiversity.
   OR
   1. Role of Biological indicators in Environment.
   2. Hotspots of Biodiversity
   3. Global diversity.

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