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15. BIODIVERSITY AND

CONSERVATION

Biology Smart Booklet

Theory + NCERT MCQs + NEET PYQs

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BIODIVERSITY AND CONSERVATION

Biodiversity:
Biodiversity or biological diversity is the occurrence of different types of ecosystems,
different species of organisms and their variant like biotypes, ecotypes and gene
adapted to different climates and environments of different regions including
their interactions and processes. This term was coined by Edward Wilson. The vast
array of species of micro-organisms, algae, fungi, plants and animals occurring
on the earth either in the terrestrial or aquatic habitats and the ecological
complexes of which they are a part comprises biodiversity. Diversity ranges from
macromolecules to biomes.

The important diversity at the levels of biological organization are:

• Genetic Diversity: A single species might show high diversity at the genetic level
over its distributional range. Rauwolfia vomitoria shows genetic variation in terms
of concentration and potency of chemical reserpine India has more than 50,000
genetically different strains of rice and 1000 varieties of mango.

• Species Diversity: diversity at species level for example, the Western Ghats have
more amphibian species diversity than the Eastern Ghats.

• Ecological Diversity: deserts, rain forests, mangroves, coral reefs, wetlands,

estuaries and alpine meadows are types of ecological diversity.

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• Biodiversity and its conservation are vital environmental issues of international

concern as more and more people around the world begin to realize the critical
importance of biodiversity for survival and well-being on this planet.

• According to the IUCN, the total number of plant and animal species described
so far is about 1.5 million but still many species are yet to discovered and
described.

• More than 70% of all the species recorded are animals while rest are plants
including algae, fungi, bryophytes, gymnosperms and angiosperms. Among
animals, 70% of total are insects.

• The number of fungi species in the world is more than the combined total of the
species of fishes, amphibians, reptiles and mammals.

Biodiversity In India:
• India is one of the twelve mega biodiversity countries of the world.
• India has only 2.4% of the land area of the world, it has 8.1% of the global
species biodiversity.
• There are about 45,000 species of plants and about 90,000-1,00,000 species of
animals.
• New species are yet to be discovered and named.
• Applying Robert May’s global estimate, only 22% of the total species have
been recorded, India has probably more than 1,00,000 species of plants and
3,00,000 species of animals to be discovered and described.

Patterns of Biodiversity:
• Latitudinal gradients: The diversity of plants and animals is not uniform throughout
the world and shows uneven distribution. This distribution pattern is along the
latitudinal gradient in diversity. Species diversity decreases as we move away
from the equator towards the poles. Tropics harbor more species than temperate
or polar areas. Amazonian Rainforest has the greatest biodiversity on earth. It has
more than 40000 species of plants, 1,25,000 species of insects, 300 species of fish,
427 of amphibian and 378 of reptiles, 1300 species of birds and 427 of mammals.
Various hypothesis has been proposed regarding this such as.
• Speciation is a function of time unlike temperate regions subjected to frequent
glaciation in past, tropical latitudes have remained relatively undisturbed for
millions of years and thus had long evolutionary time for species diversification.
• Tropical environments unlike temperate ones are less seasonal and more
constant and predictable which promote niche specialization and lead to a
greater species diversity.
• There is more solar energy available in the tropics which contribute to higher
productivity this in turn contribute indirectly to greater diversity.

Species-Area relationships:
Alexander Von Humboldt has observed that within a region, species richness gets

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increased when explored area is increased, but only up to a limit.

The relationship between species richness and area for a number of taxa like
angiospermic plants, fresh water fishes and birds is found to be a rectangular
hyperbola.

On logarithmic scale, the relationship is a straight line described by the equation.

log S = log C + Z log A.

Where, S = species, A = Area, Z = slope of the line, C = Y intercept.

• Ecologists have discovered that the value of Z lies in range of 0.1 to 0.2 regardless
of taxonomic group of the region.
• In very large area like continents, Z value ranges between 0.6 & 1.2.

The importance of Species Diversity to the Ecosystem:

• The communities with more species are generally more stable than those with
less species. A stable community should not be show too much variation in
productivity from year to year.
• Rich biodiversity is essential for ecosystem health and imperative for the very
survival of human race on this planet.
• Rivet popper hypothesis: Given by Paul Ehrlich. In an airplane (ecosystem) all
parts are joined together using thousands of rivets (species). If every passenger
travelling in it starts popping a rivet to take home (causing a species to become
extinct), it may not affect flight safety (proper functioning of the ecosystem)
initially, but as more and more rivets are removed, the plane becomes
dangerously weak over a period of time. Furthermore, which rivet is removed
may also be critical. Loss of rivets on the wings (key species that drive major
ecosystem functions) is obviously a more serious threat to flight safety than loss of
a few rivets on the seats or windows inside the plane.

Loss of Biodiversity:
The biological wealth of our planets have been declining rapidly due to three factors
– Population, Urbanization and Industrialization. The IUCN Red List (2004)

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documents the extinction of 784 species (including 338 vertebrates, 359

invertebrates and 87 plants) in the last 500 years. Some examples of recent
extinctions include the dodo (Mauritius), quagga (Africa), thylacine (Australia),
Steller’s Sea Cow (Russia) and three subspecies (Bali, Javan, Caspian) of tiger. In
last 20 years, 27 species have been disappeared. In general, loss of biodiversity
in a region may lead to.

• Decline in plant production.

• Lowered resistance to environmental perturbations, drought, and flood.
• Increased variability in ecosystem processes such as productivity, water use, and
pest and disease cycles.

Causes of biodiversity losses:

Faster rates of species extinctions are largely due to human activities. The four major
causes are called ‘The Evil Quartet’.

• Habitat loss and fragmentation: Is the most important cause of animals and plants
extinction. The amazon rain forest (lungs of the planet) having millions of species
is being cut and cleared for cultivating soya beans or for conversion to
grasslands. When large habitats are broken up into small fragments due to
various human activities, mammals are birds requiring large territories migrate
and badly affected.
• Over-exploitation: When biological system is over exploited by man for the
natural resources, it results in degradation and extinction of the resources, e.g.
Steller’s sea cow, passenger pigeon etc. Many marine fish populations are over
harvested, endangering the continued existence of some important species.
• Alien species invasions: When alien species enters intentionally or unintentionally,
some of them turn invasive and cause decline or extinction of indigenous
species. The Nile perch introduced into Lake Victoria in east Africa led eventually
to the extinction of an ecologically unique assemblage of more than 200 species
of cichlid fish in the lake. Invasive weeds species like carrot grass (parthenium),
Lantana and water hyacinth causing threats to indigenous species.
• Co-extinctions: When a species becomes extinct, the plant and animal species
associated with it also become extinct. When a host fish species becomes
extinct, its unique assemblage of parasites also becomes extinct.

Biodiversity Conservation:
We should conserve the biodiversity due to following groups of regions:

• The narrowly utilitarian: Human obtain countless direct economic benefits from
nature like food, firewood, fibers, construction material, medicinal plants and
industrial products. With increasing resources put into ‘bio-prospecting’ nations
endowed with rich biodiversity can expect to reap enormous benefits.
• The Broadly Utilitarian: Biodiversity plays a major role in ecosystem services that
nature provides. Productions of Oxygen during photosynthesis, pollination
without natural pollinator, pleasure from nature are priceless.
• Ethical: For conserving biodiversity relates to what we own to millions of plants,

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animals and microbes species with whom we share this planet. Every species has
an intrinsic value although it may not be of current or any economic value to us.
It is our moral duty to care for their well-being and pass on our biological legacy
in good order to future generations.
When whole ecosystem is conserved, all its biodiversity is also protected.

There are two ways of conservation of biodiversity:

In situ (on site) conservation: Conservationists have identified for maximum protection
certain ‘biodiversity hotspots’ regions with very high levels of species richness and
high degree of endemism, species found in that region and not found anywhere
else. There are 34 biodiversity hot spots in the world. These hotspots are also
regions of accelerated habitat loss. India has 14 biosphere reserves, 90 national
parks and 448 wildlife sanctuaries.
Ex situ (off site) conservation: In this method, threatened animals and plants are taken
out from their natural habitat and placed in special setting when they be
protected and given special care . Zoological parks, Botanical Gardens and
wildlife safari parks are used for this purpose. Now gametes of threatened species
can be preserved in viable and fertile condition for long periods of time using
cryopreservation technique. Eggs can be fertilized in vitro and plants can be
propagated using tissue culture methods.
The historic convention on Biological Diversity (The Earth Summit) held in Rio de Janeiro in
1992,called upon all nations to take appropriate measures for conservation of
biodiversity and the World Summit on sustainable development held in 2002 in
Johannesburg, South Africa, 190 countries pledged their commitment to achieve by
2010, a significant reduction in the current rate of biodiversity loss at global, regional
and local levels.

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NCERT LINE BY LINE QUESTIONS

15.1 Biodiversity
1. Term ‘Biodiversity’ popularized by (Pg. 258, E)
A) Robert hook B) Ernst Haeckel C) Edward Wilson D) G. Tansley
2. Edward Wilson was a - (Pg. 258, E)
A) Mathematician B) Sociobiologist C) Psychologist D) None of the above
3. ‘Biodiversity’ was popularized (Pg. 259, E)
A) To describe the combined diversity B) to describe individual diversity
C) To describe plant diversity D) None of the above
4. Types of Biodiversity is/are- (Pg. 259, E)
A) Genetic diversity B) Species diversity
C) Ecological diversity D) All of these
5. The genetic variation shown in (Pg. 259, E)
A) Rouwolfia vomitoria B) Rice
C) Mango D) All of the above
6. Active chemical in Rauwolfia vomitoria (Pg. 259, E)
A) Terpine B) Reserpine C) Asprine D) None of the above
7. Which one is correct about Genetic diversity (Pg. 259, E)
A) Genetic variation shown by Rauwolfia vomitoria
B) Genetic variation shown in western ghats.
C) India has less than 5000 genetically different strain of rice
D) India has 1,000 varieties of rice
8. India has more than… .. genetically different strains of rice, and …varieties of Mango. (Pg. 259, E)
A) 50,000, 1,000 B) 1,000 & 50,000 C) 5,000, 1,000 D) 1,000 & 5,000
9. The diversity at the species level is c/a (Pg. 259, E)
A) Ecological diversity B) Genetic diversity
C) Species diversity D) None of these
10. The ……..Ghats have a greater amphibian species diversity than the ….. Ghats. (Pg. 259, E)
A) Eastern, Western B) Western, Eastern C) Western, Southern D) Eastern, Southern
11. Ecological diversity is in (Pg. 259, E)
A) Deserts B) Rain forests, Mangroves
C) Coral reefs, Wetlands D) All of the above
12. Biodiversity and its conservation is of (Pg. 259, E)
A) national concern B) concern in some states of india
C) international concern D) all of these
15.1.1 How many species are there on Earth How many in India.
13. IUCN stands for- (Pg. 259, E)
A) International unity for conservation of Nature
B) Indian union for conservation of Nature
C) Italian union for conservation at Nature
D) International Union for conservation of Nature and Natural Resources
14. Robert may estimates the global species diversity at about (Pg. 259, E)
A) 7 billion B) 70 million C) 7 million D) 70 billion
15. Most species rich taxonomic group are (Pg. 260, E)
A) Crustaceans B) Insects C) Molluscs D) None of the above
16. In all available species more than 70% of all the species recorded are _____ which ______ camprise
no more than 22% of the total (Pg. 260, E)
A) Invertebrates, Plants B) Plants, Animal
C) Animal, Plants D) Plant, Invertebrates
17. Highest variation of species in plants is in- (Pg. 260, E)

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A) Fungi B) Mosses C) Algae D) Lichens

18. In vertebrates maximum No. of species found in (Pg. 260, E)
A) Birds B) Mammals C) Fishes D) Reptiles
19. Problem behind no given figures about prokaryotes is (Pg. 260, E)
A) Conventional taxonomic methods are not suitable for identifying microbial species
B) Many species are simply not culturable under laboratory conditions
C) Because prokaryotes are non-living
D) A & B both are correct
20. India has only …….. percent at the world’s land area. Its share of the global species diversity in an
impressive….percent. (Pg. 261, E)
A) 2.4, 8.1 B) 8.1, 2.4 C) 4.1, 8.2 D) 8.4, 2.1
21. India is one of the ….mega diversity countries of the world. (Pg. 261, E)
A) 13 B) 14 C) 12 D) 11
22. How may plant species found in India roughly (Pg. 261, E)
A) 1,00,000 B) 45,000 C) 3,00,00 D) None of the above
23. According to May’s global estimate there are probably…..plant species & more than …..animal
species. (Pg. 261, E)
A) 3,00,000 & 1,00,000 B) 30,000 & 10,000
C) 1,00,000 & 3,00,000 D) 10,000 & 30,000
15.1.2 Patterns of Biodiversity
24. Species diversity decreases as (Pg. 261, E)
A) We move away from the equator towards the poles
B) We move away from the poles towards equator
C) We move hill to plane area
D) None of the above
25. How many species of birds found in India? (Pg. 261, E)
A) 1500 B) 1400 C) 1200 D) 1700
26. Greatest biodiversity on earth is found in (Pg. 261, E)
A) Sundarbans B) Amazon rain forest C) Congo rain forest D) None of the above
27. Amazon Rainforest situated in (Pg. 261, E)
A) North America B) North India C) South America D) West America
28. Choose the correct option (Pg. 261, E)
1 Plant i 378
2 Fishes ii 40,000
3 Birds iii 427
4 Mammals iv 3,000
5 Reptiles v 1,300
32. The relation b/w species richness & area for a wide variety of taxa turns out to be a (Pg. 262, E)
A) Linear B) Sigmoid
C) Rectangular Hyperbola D) None of the above
33. Correct equation of species-Area relationship (Pg. 262, E)
A) log A = log S + Z log C B) log S = log C + Z log A
C) log S = log Z + C log A D) log S = log C – Z log A
34. In species area relationship equation, Z stands for- (Pg. 262, E)
A) Slope of the line B) Regression coefficient
C) species richness D) Both a & B are correct
35. Value of Z is (Pg. 262, E)
A) 20-30 B) 1 – 2 C) 0.1 – 0.2 D) None of the above
36. The value of Z in the entire continents (Pg. 262, E)
A) 0.8 – 1.8 B) 0.6 – 1.2 C) 0.1 - 0.2 D) None of the above
37. The value of Z for frugivorous birds & mammals in the tropical forests of different continents
(Pg. 262, E)
A) 2.15 B) 0.5 C) 1.15 D) 0.8

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38. Concept of species-Area relationship given by (Pg. 262, E)

A) Robert Frost B) Paul Ehrlich C) Alexander hook D) Alexander Von Humboldt
39. Alexander von Humboldt is a (Pg. 262, E)
A) German naturalist B) Philosopher
C) Geographer D) Both A & C are correct
40. According to Alexander species richness (Pg. 262, E)
A) Increased with increasing explored area, but only up to a limit
B) Decreased with increasing explored area, but only up to a limit
C) Increased with decreasing explored area, but there are no limitations
D) None of the above
41. Find out A and B and also select the correct answer (Pg. 262, E)
A) a = species richness
b = Area
B) a = area
b = species richness
C) a = Area
b = Regression coefficient
D) none of these
42. In species-area relationship equation (Pg. 262, E)
A) S = species richness B) A = area
C) C = Y – intercept D) All of these
43. Which one is correct about a stable community? (Pg. 262, E)
A) Should not show too much variation in productivity from year to year
B) It must be either resistant or resilient on surface disturbance
C) It must also be resistant to invasions by alien species
D) All of these are correct
44. Find out correct option about David Tilman’s long term ecosystem experiments (Pg. 263, E)
A) Plots with more species showed less year-to-year va riation in total biomass
B) Plots with more species show too much variation in productivity
C) Increased diversity contributed to higher productivity
D) Both A & C are correct
45. ‘Rivet popper hypothesis’ is given by (Pg. 263, E)
A) Alexander von Humboldt B) Paul Ehrlich
C) Tilman D) Robert hook
46. Paul Ehrlich is a (Pg. 263, E)
A) Stanford ecologist B) Stanford psychologist
C) Stanford micrologist D) Stanford geologist
47. In Rivet popper hypothesis, rivets depict as (Pg. 263, E)
A) Ecosystem B) Extinct species C) Species D) Plants
48. According to Ehrlich’s rivet popper hypothesis loss of rivets on the wings affects in ecosystem as-
(Pg. 263, E)
A) Loss of key species that drive major ecosystem function
B) Proper functioning of ecosystem
C) Species to become extinct
D) None of these
49. According to rivet popper hypothesis, which one is not correct (Pg. 263, E)
A) Rivet – species
B) Airplane – Ecosystem
C) Rivets to take home – species to become extinct
D) All of these are correct
15.1.4 Loss of Biodiversity
50. The colonization of tropical pacific islands by humans is said to have led to the extinction of more
than ______ of native birds (Pg. 263, E)
A) 2000 species B) 1200 species C) 20000 species D) 200 species

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51. According to red list (2004) No. of total extinct species in last 500 years (Pg. 263, E)
A) 504 species B) 387 species C) 478 species D) 784 species
52. How many species of invertebrates become extinct in last 500 years (Pg. 263, E)
A) 87 species B) 784 species C) 359 species D) None of these
53. According to recent extinction which one is incorrect option – (Pg. 263, E)
A) Dodo – Mauritius B) Steller’s sea cow – USA
C) Quagga – Africa D) Thylacine – Australia
54. Subspecies of tiger which become recently extinct (Pg. 263, E)
A) Bali B) Caspian C) Javan D) All of these
55. The last 20 years alone have witnessed the disappearance of ______ (Pg. 263, E)
A) 300 species B) 10 species C) 27 species D) 1000 species
56. Match the following- (Pg. 264, E)
Species % of threat of extinction
a Birds 1 23%
b Mammals 2 32%
c Amphibians 3 12%
d Gymnosperms 4 31%
A) a-1, b-3, c-2, d-4 B) a-3, b-1, c-2, d-4
C) a-3, b-1, c-4, d-2 D) a-3, b-4, c-1, d-2
57. Select the correct statement about ‘Sixth Extinction’ (Pg. 264, E)
A) The extinction rates are estimated to be 100 - 1000 times faster than in the pre-human times.
B) Human activities are responsible for the faster rates.
C) Half of all the species on Earth might be wiped out within the next 1000 years.
D) Both A and B option are correct.
58. Loss of biodiversity in a region may lead to (Pg. 264, E)
A) decline in plant production,
B) lowered resistance to environmental. perturbations such as drought.
C) Increased variability in ecosystem process.
D) All of these.
59. ‘The Evil Quartet’ is the term used to describe (Pg. 264, E)
A) Causes of habitat losses B) Causes of biodiversity losses.
C) Causes of water losses D) All of these.
60. The accelerated rates of species extinctions are largely due to (Pg. 264, E)
A) Natural activities B) Machines activities C) human activities D) none of these
61. Which one is not involved in the evil quartet? (Pg. 264, E)
A) Habitat loss and fragmentation B) Alien species invasions
C) over - exploitation D) all are involved
62. The most important cause of animals and plants to extinction (Pg. 265, E)
A) Over exploitation B) Alien species invasions
C) Co-existence D) Habitat loss and fragmentation.
63. Lungs of the planet term used for (Pg. 265, E)
A) Tropical rain forest, B) Amazon rainforest,
C) temperate reason, D) none of these.
64. The Amazon rainforest harboring probably millions of species to is being cut and cleared for.
(Pg. 266, E)
A) For cultivating soya beans. B) Conversion to grassland for raising beef cattle.
C) Cultivating new forest. D) Both A and B are correct.
65. When large habitats are broken up into small fragments due to various _______, mammals and birds
requiring large territories and certain animals with migratory habits are badly affected, leading to
___b____.(Pg. 266, E)
A) a – Nature activities,
b – Population declines
B) a – Human activities,

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b – Population declines
C) a – Human activities,
b – Population increasing
D) none of these
66. Once covering more than ______ percent of Earth’s land surface, these rain forests now cover no
more than _______ percent. (Pg. 264, E)
A) 6, 14 B) 14, 8 C) 14, 6 D) 12, 8
67. Species extinct in the last 500 years due to over exploitation by humans. (Pg. 265, E)
A) Steller’s sea cow B) Cichlid fish C) Passenger pigeon D) A & C both are correct
68. How many species of cichild fish is extinct due to introduction of Nile perch in lake victoria?
(Pg. 265, E)
A) 2 B) 20 C) 200 D) 2000
69. The environmental damage caused and threat posed to our native species by invasive weed species
like. (Pg. 265, E)
A) Carrot grass B) water hycinth C) lantana D) all of these.
70. African catfish _______ is posing as threat to the indigenous catfishes. (Pg. 265, E)
A) Parthenium B) Clarias garlepinus
C) Clarias branchysoma D) None of these
71. Which one is correct statement about co-extinction? (Pg. 265, E)
A) When a species become extinct, the plant and animal species associated with it in an obligatory
way also become extinct.
B) When a host becomes extinct, it's unique assemblage of parasites also meets the same fate
C) In the plant pollinator mutualism, where extinction of one invariably leads to the extinction of the
other.
D) All these statements are correct.
72. Which one is not an example of Alien species invasions? (Pg. 265, E)
A) Parthenium B) Steller’s sea cow C) Catfish D) Lantana
73. Purpose of introducing the African cat fish in the Indian River. (Pg. 265, E)
A) For Aquaculture B) For ornamental purpose
C) For agriculture D) None of these.
15.2 Biodiversity Conservation
74. Reason behind conserving the biodiversity. (Pg. 265, E)
A) Narrowly utilitarian. B) Broadly utilitarian.
C) Ethical D) All of these
75. More than 25% of the drugs currently sold in the market worldwide are derived from __i__ and
__ii__ species of plants contribute to the traditional medicines used by native peoples around the
world. (Pg. 265, E)
A) i- plants, ii- 25,000 B) i- Animals, ii- 25,000
C) i- Animals, ii- 25,00 D) i- plants, ii- 25,00
76. How much oxygen is produced by Amazon Forest through Photosynthesis? (Pg. 266, E)
A) 20% of the total oxygen. B) 30% of the total oxygen.
C) 25% of the total oxygen. D) None of these.
77. Select the correct option about ethical argument. (Pg. 266, E)
A) In ethical argument of conserving biodiversity relates to what we are to million of plant, animals
and micro species with whom we share this planet.
B) We need to realize that every species has an intrinsic value.
C) We have a moral duty to care for their well being and pass on our biological legacy in good order
to future generation.
D) All these statements are correct.
15.2.2 How do we conserve biodiversity?
78. Species confined to that region and not found anywhere else is called as- (Pg. 266, E)
A) In situ B) Exotic C) Endemic D) None of these
79. Initially ___i___ biodiversity hotspots were identified, but after some time ___ii___ more have been
added and the total number of biodiversity hotspot in the world to __iii__ . (Pg. 266, E)

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A) i- 25, ii- 9 B) ii- 8, iii- 30 C) i- 23, iii- 34 D) none of these

80. Match the following (Pg. 266, E)
Column I Column II
a Biosphere reserve 1 448
b National parts 2 14
c Wildlife centuries 3 90

A) Biosphere reserves B) National parks C) Zoological parks D) Sacred groves

86. Which one is not the hotspot in India? (Pg. 267, E)
A) Western ghats B) Indo Burma C) Eastern Ghats D) Himalaya
87. Sacred groves are that- (Pg. 267, E)
A) Place which are protected for animals.
B) Place where all people are worship.
C) Place where religion and cultural traditions that emphasized protection of nature
D) None of these
88. Sacred groves, Khasi and Jaintia hills located in- (Pg. 267, E)
A) Meghalaya B) Manipur C) Mizoram D) Madhya Pradesh
89. What is endangered or threatened? (Pg. 267, E)
A) Organisms facing a very high risk of death due to environment.
B) Organisms facing a very high risk of extinction, in the near future.
C) Organism facing a very high risk of danger from other organisms.
D) None of these.
90. Which one of the following is not an example of Ex-situ conservation? (Pg. 267, E)
A) Zoological parks B) Botanical Gardens C) Biosphere reserves D) none
91. Gametes of threatened species can be preserved in variable and fertile condition for long period
using (Pg. 267, E)
A) Heat B) Cryopreservation C) Both D) None of these
92. Threatened plant species can be propagated by- (Pg. 267, E)
A) Tissue Culture B) Aquaculture C) Cryopreservation D) None of these
93. The Earth’s summit held in Rio de Janeiro in. (Pg. 267, E)
A) 2000 B) 1990 C) 1992 D) 2002
94. The world’s summit on sustainable development held in 2002 in. (Pg. 267, E)
A) Johannesburg, South Africa. B) Cape town South Africa.
C) Rio de Janeiro. D) East America
95. How many countries pledged in world summit held in 2002 in Johannesburg? (Pg. 267, E)
A) 200 B) 180 C) 170 D) 190
96. In which type of conservation threatened animals and plants are taken out from their natural habitat
and placed in special selting place where they can be protected and given a special care? (Pg. 267, E)
A) Cryopreservation B) Ex-situ conservation
C) In-situ conservation D) None of these
97. Seeds of different genetic strains of commercially important plants can be kept for long period in
(Pg. 267, E)
A) Cryopreservation B) Tissue culture C) Seed bank D) None of these
98. Which are involved in In-situ conservation? (Pg. 267, E)
(i) Biosphere reserve (ii) Cryopreservation (iii) Tissue culture (iv) Seed bank (v) National park
(vi) Zoological park (vii)Sacred groves (viii) Safari parks
A) iii, vii, v B) ii, iii, i C) i, v, vii D) iv, vi, i
99. Pledge of Earth Summit held in Rio de Janeiro. (Pg. 267, E)
A) All nations to take appropriate measure for conservation of biodiversity and sustainable utilization of
its benefit.
B) All nations are free to utilize natural resources and also harm the ecosystem.
C) Significant reduction in the current rate of biodiversity loss at global, regional and local levels.
D) None of these
100. What is correct about the historic convention on biological diversity? (Pg. 267, E)

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(i) It held in Rio de Janeiro (ii) In 1992

(iii) Also called the earth summit (iv) 190 states Pledged in this summit
(v) Commitment to achieve by 2020
A) i, ii, iv B) i, ii, iii C) iii, iv, i D) all
101. In recent years, which type of conservation has advanced beyond keeping threatened species in
enclosures? (Pg. 267, E)
A) In-situ conservation B) Ex-situ conservation
C) None of these D) Both A & B

NEET PREVIOUS YEARS QUESTIONS

1. Niche is [2018]
(a) all the biological factors in the organism’s environment.
(b) the physical space where an organism lives.
(c) the functional role played by the organism where it lives.
(d) the range of temperature that the organism needs to live.
2. All of the following are included in ‘ex-situ conservation’ except: [2018]
(a) Wildlife safari parks (b) Sacred groves
(c) Seed banks (d) Botanical gardens
3. Alexander Von Humbolt described for the first time: [2017]
(a) Laws of limiting factor. (b) Species area relationships.
(c) Population Growth equation. (d) Ecological Biodiversity.
4. Which one of the following is related to Ex-situ conservation of threatened animals and plants? [2017]
(a) Biodiversity hot spots (b) Amazon rainforest
(c) Himalayan region (d) Wildlife safari parks
5. The region of biosphere reserve which is legally protected and where no human activity allowed, is
known as: [2017]
(a) Buffer zone (b) Transition zone (c) Restoration zone (d) Core zone
6. Which is the national aquatic animal of India? [2016]
(a) Gangetic shark (b) River dolphin (c) Blue whale (d) Sea-horse

7. Which of the following is the most important cause of animals and plants being driven to extinction?
[2016]
(a) Over – exploitation (b) Alien species invasion
(c) Habitat loss and fragmentation (d) Co-extinction
8. The species confined to a particular region and not found elsewhere is termed as: [2015]
(a) alien (b) endemic (c) rare (d) keystone
9. Cryopreservation of gametes of threatened species in viable and fertile condition can be referred to as:
[2015]
(a) advanced ex-situ conservation of biodiversity. (b) in-situ conservation by sacred groves.
(c) in-situ cryo-conservation of biodiversity. (d) in-situ conservation of biodiversity.
10. In which of the following, both pairs have correct combination? [2015]
(a) In-situ conservation : Cryopreservation Ex-situ conservation : Wildlife Sanctuary
(b) In-situ conservation : Seed Bank Ex-situ conservation : National Park
(c) In-situ conservation : Tissue culture Ex-situ conservation : Sacred groves
(d) In-situ conservation : National Park Ex-situ conservation : Botanical Garden
11. Given below is the representation of the extent of global diversity of invertebrates. What groups the
four portions (A-D) represent respectively? [2014]

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12. An example of ex situ conservation is: [2014]

(a) National park (b) Seed bank (c) Wildlife sanctuary (d) Sacred grove
13. A species facing extremely high risk of extinction in the immediate future is called: [2014]
(a) vulnerable (b) endemic (c) critically endangered (d) extinct
14. Which one of the following is not a method of in situ conservation of biodiversity? (NEET-2019)
(1) Biosphere Reserve (2) Wildlife Sanctuary (3) Botanical Garden (4) Sacred Grove
15. Which of the following is the most important causes for animals and plants being driven to extinction?
(1) Habitat loss and fragmentation (2) Drought and floods (NEET-2019)
(3) Economic exploitation (4) Alien species invasion
16. The Earth Summit held in Rio de Janeiro in 1992 was called : (NEET-2019)
(1) to reduce CO2 emissions and global warming.
(2) for conservation of biodiversity and sustainable utilization of its benefits.
(3) to assess threat posed to native species by invasive weed species.
(4) for immediate steps to discontinue use of CFCs that were damaging the ozone layer.
17. Decline in the population of indian native fishes due to introduction of Clarias gariepinus in river
Yamuna
can be categoriesd as (NEET-2019 ODISSA)
(1) Co-extinction (2) Habitat fragmentation (3) Over exploitation (4) Allen species invasion
18. Western Ghats have a large number of plant and animal species that are not found anywhere
else.Which of the following terms will you use to notify such species? (NEET-2019 ODISSA)
(1) Endemic (2) Vulnerable (3) Threatened (4) Keystone
19. Exploration of molecular, genetic and species level diversity for novel products of economic
importance is known as : (NEET-2019 ODISSA)
(1) Biopiracy (2) Bioenergetics (3) Bioremediation (4) Bioprospecting
20. In the following in each set a conservation approach and an example of method of conservation are
given (NEET-2020 COVID-19)
(a) In situ conservation - Biosphere Reserve (b) Ex situ conservation - Sacred groves
(c) In situ conservation - Seed bank (d) Ex situ conservation – Cryopreservation
Select the option with correct match of approach and method :
(1) (a) and (c) (2) (a) and (d) (3) (b) and (d) (4) (a) and (b)
21. According to Alexander von Humboldt : (NEET-2020 COVID-19)
(1) Species richness decreases with increasing area of exploration
(2) Species richness increases with increasing area, but only up to limit
(3) There is no relationship between species richness and area explored.
(4) Species richness goes on increasing with increasing area of exploration
22. Which of the following regions of the globe exhibits highest species diversity? (NEET-2020)

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1) Amazon forests 2) Western Ghats of India 3) Madagascar 4) Himalayas

23. According to Robert may, the global species diversity is about (NEET-2020)
1) 7 million 2) 1.5 million 3) 20 million 4) 50 million
24. Which of the following is not a method of ex situ conservation? (NEET-2022)
1) In vitro fertilization 2) National Parks
3) Micropropagation 4) Cryopreservation
25. Habitat loss and fragmentation, over exploitation, alien species invasion and co-extinction
are causes for: (NEET-2022)
1) Population explosion 2) Competition
3) Biodiversity loss 4) Natality
26. In-situ conservation refers to: (NEET-2022)
1) Protect and conserve the whole ecosystem
2) Conserve only high risk species
3) Conserve only endangered species
4) Conserve only extinct species

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NCERT LINE BY LINE QUESTIONS – ANSWERS

Q 1 2 3 4 5 6 7 8 9 10
Ans C B A D D B A A C B
Q 11 12 13 14 15 16 17 18 19 20
Ans D C D C B C A C D A
Q 21 22 23 24 25 26 27 28 29 30
Ans C A C A C B C A A D
Q 31 32 33 34 35 36 37 38 39 40
Ans A C B D C B C D D A
Q 41 42 43 44 45 46 47 48 49 50
Ans B D D D B A C A D A
Q 51 52 53 54 55 56 57 58 59 60
Ans D C B D C B D D B C
Q 61 62 63 64 65 66 67 68 69 70
Ans D D B D B C D C D B
Q 71 72 73 74 75 76 77 78 79 80
Ans D B A D A A D C A A
Q 81 82 83 84 85 86 87 88 89 90
Ans D C A C C A D A B C
Q 91 92 93 94 95 96 97 98 99 100
Ans B A C C D B C C A D
Q 101
Ans B

NEET PREVIOUS YEARS QUESTIONS-ANSWERS

1 (c) 2 (b) 3 (b) 4 (d) 5 (d) 6 (b) 7 (c) 8 (b) 9 (a) 10 (d)
11 (d) 12 (b) 13 (c) 14 (3) 15(1) 16(2) 17(4) 18(1) 19(4) 20(2)
21 (2) 22 (1) 23 (1) 24 (2) 25(3) 26(1)

NEET PREVIOUS YEARS QUESTIONS-EXPLANATIONS

1. (c) Joseph Grinnell in 1917 coined the term niche, which he used as largely equivalent to a species
habitat. It refers the functional role played by the organism where it lives.
2. (b) In-situ conservation is the on-site conservation or the conservation of genetic resources in natural
populations of plant or animal species. E.g. sacred groves.
3. (b) Alexander Von Humbolt noticed that within a region species richness increases with the increase in
area.
4. (d) 5. (d) 6. (b) 7. (c)
8. (b) Endemic species is confined to a particular area due to special type of adaptation according to that
region.
9. (a)
10. (d) In-situ (on site) conservation is within the natural habitat, e.g., sea, river and forest. Ex-situ (off site)
conservation is outside the natural habitat, e.g. zoological park.
11. (d) 12. (b)
13. (c) Critically endangered species includes those which taxon face very high risk of extinction in the wild
can become extinct any moment in the immediate future,
e.g., Sus salvinus (Pigmy Hog), Berberis nilghiriensis.

22. The largely tropical Amazonian rain forest in South America has the greatest biodiversity on the globe
23. Robert May estimated global species diversity at about 7 million.
24. National Parks in situ conservation
25. Biodiversity loss
26. In situ conservation conserve whole ecosystem

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