DCM2204 ENVIRONMENTAL SCIENCE

Description

SESSION	MARCH 2025
PROGRAM	BACHELOR OF COMMERCE (B.COM)
SEMESTER	IV
COURSE CODE & NAME	DCM2204 ENVIRONMENTAL SCIENCE

 

 

Assignment Set – 1

 

 

Q1. Briefly explain Biogeochemical cycle. Discuss the Nitrogen cycle in detail and explain how human activities impact the nitrogen cycle. 5+5         

Ans 1.

Biogeochemical Cycle and Its Importance

The biogeochemical cycle refers to the natural pathways through which essential elements of living matter are circulated within the Earth’s ecosystems. These cycles involve biological, geological, and chemical processes, hence the term “biogeochemical.” Major biogeochemical cycles include the carbon cycle, nitrogen cycle, phosphorus cycle, sulfur cycle, and the water cycle. These cycles help maintain the sustainability of ecosystems by recycling nutrients and ensuring their continuous availability to living organisms. Without such cycles, ecosystems would run out of the

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Q2. What are the two main components of an Ecosystem, explain with suitable examples. Also describe the food chain and its importance in maintaining the balance of the ecosystem. 5+5

Ans 2.

Components of an Ecosystem

An ecosystem is a self-regulating system where living organisms interact with each other and their physical environment. It is composed of two primary components: biotic and abiotic. These components work together to sustain life processes and ensure ecological balance. An example of an ecosystem can be a pond, where fish, plants, insects, water, sunlight, and soil interact to form a dynamic

 

Q3. Give a brief comparison between renewable and non-renewable natural resources. 10

Ans 3.

Comparison Between Renewable and Non-Renewable Natural Resources

Natural resources are materials provided by nature that are used by humans for survival, development, and industrial purposes. These resources are broadly classified into two categories: renewable and non-renewable. The classification depends on the ability of the resource to regenerate over time and the rate at which it is consumed. Understanding the difference between these two types of resources is crucial for promoting sustainable development and

 

Assignment Set – 2

 

 

Q4. What is Biodiversity and what are its different types. Briefly comment on Biodiversity hotspots, endangered vs endemic species. 4+6           

Ans 4.

Understanding Biodiversity and Its Types

Biodiversity, or biological diversity, refers to the variety of life forms on Earth, including the different species of plants, animals, microorganisms, the genetic differences among them, and the ecosystems in which they occur. It is a key indicator of the health of the planet and plays a vital role in maintaining ecological balance. Biodiversity ensures the stability of ecosystems by supporting processes

 

Q5. Among water, air and noise pollution, which do you consider the most severe? Justify your answer with reasons.          10       

Ans 5.

Most Severe Form of Pollution: A Comparative Perspective

Pollution is the contamination of the natural environment due to the presence of harmful substances that disrupt ecological balance and pose health risks to all living organisms. The major types of pollution include water, air, and noise pollution, each having significant adverse impacts. However, air pollution is often considered the most severe among them due to its widespread

 

 

Q6. Why do we need proper management of solid waste disposal, support your answer with appropriate examples.        10

Ans 6.

The Need for Proper Management of Solid Waste Disposal

Solid waste refers to all the discarded materials from households, industries, commercial activities, and institutions that are no longer useful. As urbanization, industrialization, and population growth increase, the amount of solid waste generated globally has reached alarming levels. Improper disposal of this waste can lead to severe environmental degradation, health hazards, and loss of valuable resources. Hence, proper solid waste management is not