IV/BCA/401 Student's Copy
2 0 1 8
CBCS
4th Semester
BACHELOR OF COMPUTER APPLICATIONS
Paper No. BCA-401
Environment and Ecology
Full Marks 75
Time 3 hours
PART A—OBJECTIVE
Marks 25
The figures in the margin indicate full marks for the questions
SECTION—A
Marks 15
1. Tick the correct answer in the brackets provided 1×10=10
Who wrote the Origin of Species, which brought to light the close
relationship between habitats and species?
Ralph Emerson
E. O. Wilson
Charles Darwin
John Muir
The lithosphere began as a hot ball of matter which formed the earth
about
3·2 billion years ago
3·6 billion years ago
4·2 billion years ago
4·6 billion years ago
/544 1 Contd.
The Narmada Bachao Andolan in India is an example of a movement
against
large dams
small dams
large industry
small industry
The food pyramid has a large base of plants, which are called
first-order consumers
producers
decomposers
food chains
The food pyramid has a narrower middle section that depicts the
number and biomass of herbivorous animals, which are called
second-order consumers
carnivorous animals
producers
first-order consumers
At present conservation scientists have been able to identify and
categorise a species on earth is about
0·8 million 1·8 million
2·8 million 3·8 million
What is the percentage of Indian plants, which are endemic to the
country and found nowhere else in the world?

12% 18%
The pollutants that are produced in the atmosphere when certain
chemical reactions take place among the primary pollutants are called
single pollutants
tertiary pollutants
secondary pollutants
poly pollutants
IV/BCA/401/544 2 Contd.
The persistent pesticide banned in India for agricultural use is
DDT DOP
DAP KOP
Who believed that humans were 'trustees of the lower animal
kingdom'?
Jawaharlal Nehru
Mahatma Gandhi
Karl Marx
Abraham Lincoln
2. Tick whether the following statements are True or False 1×5=5
A predominant commercial energy sources used in India is coal.
T F
The Cheetah in India are well-known examples of extinct species.
T F
The top layer of the soil horizon is called a horizon.
T F
The World Environment Day is celebrated on 5th June.
T F
When birthrate is lesser than death rate, it is called zero-population
growth.
T F
SECTION—B
Marks 10
Write notes on the following 2×5=10
1. Human development index
2. Land degradation
3. Genetic diversity
4. E-waste
5. Greenhouse effect
IV/BCA/401/544 3 Contd.
PART B—DESCRIPTIVE
Marks 50
The figures in the margin indicate full marks for the questions
1. What are renewable resources? Describe briefly the exploitation of
renewable resources. 3+7=10
OR
Explain sustainable water management. Also explain the overutilization
of surface and groundwater. 4+6=10
2. What is ecosystem? Discuss the structure and function of an
ecosystem. 3+7=10
OR
Define energy flow in ecosystem. With the help of diagrams, explain
different types of ecological pyramid. 2+8=10
3. What are endemic species? Explain in-situ conservation and ex-situ
conservation of biodiversity. 4+6=10
OR
Define biodiversity. Classify the hot spot of biodiversity in India. 3+7=10
4. What is water pollution? Explain point source and non-point source
of water pollution. 3+7=10
OR
What are the effective mitigation programmes in disaster management?
Discuss the mitigation measures of earthquake. 4+6=10
5. What is meant by population explosion? Explain the effect of
population on sustainable development. 3+7=10
OR
What is shifting cultivation? Write the impacts on land degradation.
4+6=10