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IGNOU LSE-02 Code Details
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University
IGNOU (Indira Gandhi National Open University)
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Title
Ecology
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Language(s)
English
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Code
LSE-02
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Subject
Life Science
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Degree(s)
B.Sc.
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Course
Core Courses (CC)
IGNOU LSE-02 English Topics Covered
Block 1 - Environment and its Components
- Unit 1 - Ecology and Ecosystem
- Unit 2 - Environmental Components: 1. Light, Temperature and Atmosphere
- Unit 3 - Environmental Components: 2. Water
- Unit 4 - Environmental Components: 3. Soil
Block 2 - Ecosystem: Functioning Types
- Unit 1 - Ecosystem Functioning
- Unit 2 - Nutrient Cycling
- Unit 3 - Types of Ecosystems: 1 Terrestrial Ecosystems
- Unit 4 - Types of Ecosystems: 2 Aquatic Ecosystems
Block 3 - Community Ecology
- Unit 1 - Nature and Structure of Community
- Unit 2 - Community Change
- Unit 3 - Community Organisation and Interaction Among Organisms
- Unit 4 - Population Parameters and Regulation
Block 4 - Humans and Ecology
- Unit 1 - An Overview of Human Evolution and Human Population
- Unit 2 - Ecosystem Degradation and the Wildlife
- Unit 3 - Environmental Pollution: Causes, Consequences and Control
IGNOU LSE-02 (January 2024 - December 2024) Assignment Questions
1. Write short notes on the following:
(a) Stratification
(b) Photoperiodism
(c) Desertification
(d) Biome
(e) Ecotone
(f) Keystone Species
(g) Domestication
(h) Bioindicators of pollution
2. Classify the aquatic organisms and describe the factors limiting the productivity of aquatic habitats.
3. Describe various components of ecosystem.
4. (a) Why pyramid of numbers are sometimes inverted whereas energy pyramids are never inverted? Explain in detail.
(b) Describe the various limitations of ecological pyramid.
5. (a) Explain the nitrogen cycle with a help of a well labeled diagram.
(b) Describe the human impact on nitrogen cycle and sulfur cycle.
6. Give an example that illustrates each of the following:
a) Primary succession
b) Secondary succession
c) Progressive succession
d) Retrogressive succession
IGNOU LSE-02 (January 2023 - December 2023) Assignment Questions
1. (a) Define the following:
(i) Community
(ii) Xerophytes
(iii) Primary production
(iv) Biosphere
(b) Write short notes on:
(i) Ecological pyramids
(ii) Tolerance range
(iii) Importance of forests
2. (a) Describe in brief abiotic and biotic components of ecosystem.
(b) Describe the structural features of hydrophytes.
3. (a) Explain the structure of soil profile with the help of a well labeled diagram.
(b) Describe the major functions of soil biota.
4. Differentiate between:
(i) Food chain and Food web
(ii) Lentic and lotic ecosystems
(iii) Primary and secondary succession
(iv) Extinct and threatened species
5. Describe carbon cycle with the help of a well labelled diagram.
6. (a) What is desertification? What are the major reasons leading to desertification?
(b) Describe the various steps involved in the process of succession of a water body.
7. (a) What are keystone species? Explain their importance giving a suitable example.
(b) Describe the major threats that affect wildlife.
8. Describe in brief:
(i) Red data book
(ii) Fidelity
(iii) Benefits of grasslands
(iv) Deforestation
(v) Eutrophication
9. Explain in detail why wildlife conservation is important?
10. (a) Describe the effects of air pollution on plants.
(b) Describe energy flow in an ecosystem.
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