VI/BCA/601 Student's Copy
2 0 1 8
6th Semester
BACHELOR OF COMPUTER APPLICATIONS
Paper No. BCA-601
Environment and Ecology
Old Course
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
Abiotic environment consists of
living things
non-living things
solar system
All of the above
Green plants constitute
complete food chain
3rd trophic level
2nd trophic level
1st trophic level
/565 1 Contd.
Ozone layer is formed in
stratosphere
mesosphere
troposphere
exosphere
A food chain which starts with green plants and culminates with
carnivores is called
grazing food chain
detritus food chain
plasma food chain
All of the above
A diversity that indicates the number of species in a single community
is called
gamma diversity
beta diversity
alpha diversity
All of the above
A species is said to be extinct when it is not seen in the wild at a
stretch of
50 years
75 years
100 years
200 years
Noise pollution is a value greater than
60 dB
80 dB
90 dB
100 dB
Per year world population is growing more than
60 million
80 million
90 million
100 million
VI/BCA/601 2 Contd.
Air pollutants mixing up with rain can cause
low acidity
high acidity
acid rain
pollutants
At present, world population is about
5·6 billion
6·6 billion
7·6 billion
8·6 billion
2. Match Column—A and Column—B with the correct answer ½×10=5
Column—A Column—B
Autotroph Christ child
Omnivores Ornithologist
Chipko Movement Green plants
Salim Ali Earnst Haeckel
World Environment Day April, 1986
World Population Day 5th June
Chernobyl Disaster December, 1984
Bhopal Disaster (viii) 11th June
El Niño Rats
Ecology was coined by Sunderlal Bahuguna
SECTION—B
Marks 10
Write notes on the following 2×5=10
1. Biotic components
2. Hot spot of biodiversity
3. Rainwater harvesting
4. Types of resource
5. Greenhouse effect
VI/BCA/601 3 Contd.
PART B—DESCRIPTIVE
Marks 50
The figures in the margin indicate full marks for the questions
1. What is environment? Discuss the scope of environment.
OR
What do you understand by the term Discuss the structural
features of ecosystem.
2. What is ecological pyramid? Write a brief description of pyramid of
numbers.
OR
What is energy in ecosystem? Write a note on energy flow in
ecosystem.
3. What do you understand by population explosion? Explain Malthusian
doctrine in population growth.
OR
What is population density? Explain the population stabilization and
sustainable development.
4. What do you mean by water pollution? Mention its sources and control
of water pollution.
OR
What is solid waste management? Discuss the sources and
management of solid waste management.
5. What is biodiversity? Mention the significants and benefits of
biodiversity.
OR
What is sustainable development? How will you measure sustainable
development?
6. What is shifting cultivation? Write the impacts on land degradation. 5+5=10
OR
What is natural resource? Write note on the conservation of resources
and alternative strategies. 4+6=10