8. BIODIVERSITY AND CONSERVATION
2020
SAY
1. (a) The term
‘biodiversity’ was popularised by ..............
(b) Name the two types of biodiversity conservation.
(c) Write any three causes of biodiversity loss. (3)
ü Answer:
(a) Edward Wilson.
(b) In situ
conservation and Ex situ conservation.
(c) Habitat loss &
Fragmentation, Overexploitation, Alien species invasion etc.
2020
MARCH
1. Select the cause
of extinction of Cichlid fish in Lake Victoria of East Africa. (1)
a.
Habitat loss
and fragmentation
b.
Over-exploitation
c.
Alien species
invasions
d.
Co-extinctions
ü Answer:
(c) Alien species
invasions
2. Tropical
Amazonian rainforest in South America has the greatest biodiversity on earth.
Do you agree with this? Explain. (2)
ü Answer:
Yes. I agree.
Tropical Amazonian rainforest has the greatest species
richness. It contains > 40000 plant species, > 5000 vertebrates and >
1,25,000 species of invertebrates. This is because tropical regions have
constant environment and gets more solar energy.
2019
SAY June
1. In your school,
the Science Club decided to conduct a seminar about "Biodiversity
conservation - Approaches". You are invited to present a paper on this
seminar. List out the main points you included in the presentation. (3)
[Hint: In Situ, Ex-Situ conservation]
ü Answer:
In situ conservation (on site): It is the conservation of genetic resources within
natural or human-made ecosystems in which they occur. E.g. National Parks,
Sanctuaries, Biosphere reserves, Sacred groves etc.
Ex situ conservation (off site): It is the conservation of organisms outside their
habitats. E.g. genetic resource centres, zoological parks, wildlife safari parks,
botanical gardens etc.
2019
MARCH
1. Which among the
following belongs to ex-situ conservation? (1)
Wildlife sanctuaries, Biosphere reserves, Zoological parks,
National parks, Sacred groves
ü Answer:
Zoological parks.
2. The causes of
biodiversity loss are designated as "EVIL QUARTET". Explain the Evil
Quartet in biodiversity loss. (2)
ü Answer:
The Evil Quartet:
a. Habitat
loss and fragmentation.
b. Overexploitation.
c. Alien
species invasion.
d. Co-extinction.
2018
SAY
1. Human beings
can conserve and protect our ecosystem and biodiversity. Prepare a handout to
show different Biodiversity conservation. (2)
ü Answer:
In situ conservation: It is the conservation of genetic resources within
natural or human-made ecosystems in which they occur. E.g. National Parks,
Sanctuaries, Biosphere reserves etc.
Ex situ conservation: It is the conservation of organisms outside their
habitats. E.g. genetic resource centres, zoological parks, wildlife safari
parks, botanical gardens, gene banks etc.
2018
MARCH
1. Observe the
graph and answer the following questions: (3)
(a) Name S, A, Z and C in the graph.
(b) Name the scientists who
explained Species-Area relationship.
ü Answer:
(a)
S= Species richness
A=
Area, Z= Slope of the line, C= Y-intercept.
(b) Alexander von
Humboldt.