BIODIVERSITY AND CONSERVATION
2010 MARCH
1.
Gopalan cultivated a variety of fruit crops and plants in his field
and Raman destroyed the fruit crops and plants and cultivated rubber trees
which are double in number.
a.
In your opinion, which method is suitable for the ecosystem? Give
reason. (1½)
b. Mention any 3 factors for the extinction
of species. (1½)
2010 SAY
1. a) The “Evil Quartet” is the nickname
used to describe the causes of biodiversity losses. Explain the reasons leading
to accelerated rates of extinction of flora and fauna.
Or
b) Philosophically
or spiritually, we need to realize that every plant or animal species have
intrinsic value and we have a moral duty to protect them. Justify the statement
and write down the protective measures. (3)
2011 MARCH
1.
The year 2010 has been declared as the International Biodiversity
Year by United Nations (UN).
a.
Point out the levels of diversity in nature. (1)
b. Give a brief description about “The Evil
Quartet” (2)
2011 SAY
1. Given are two unlabelled diagrams
depicting invertebrate and vertebrate diversity. What do A and B stand for?
2. Some terms related to biodiversity
conservation are given.
Biosphere reserves, National parks,
Zoological parks, Wildlife sanctuaries, Cryopreservation of gametes, Seed
banks, Botanical gardens, Sacred groves
a.
Arrange these terms under two suitable headings. (1)
b. Compare the two methods of conservation
and suggest how they are helpful in preventing the ‘Evil Quartet’. (1)
2012 MARCH
1.
The given graph shows the distribution of
insects in different latitudes of earth.
a. What is your
observation? (½)
b.
List the three reasons for greater
biodiversity in tropical regions. (1½)
c.
Write two causes of biodiversity losses.
(1)
Please provide answers to these questions
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