NCERT CLASS 12 | TOPIC : BIODIVERSITY AND CONSERVATION | QB-1 | NEET BIOLOGY ONLINE TEST ~ KALVISOLAI.NET

NCERT CLASS 12 | TOPIC : BIODIVERSITY AND CONSERVATION | QB-1 | NEET BIOLOGY ONLINE TEST

It contains 90 important questions. Choose the most correct answer. Then check your answer. Try again if there are errors. Regards : kalvisolai.net

1 ➤ 1. Match Column-I (organism) with Column-II(number of species).
1. Ants A. 20,000
2. Orchids B. 25,000
3. Fishes C. 28,000
4. Beetles D. 3,00,000

(a) 1:D, 2:C, 3:B, 4:A (b) 1:B. 2:A, 3:C, 4:D (c) 1:A, 2:B, 3:C, 4:D (d) 1:A, 2:A, 3:C, 4:D

2 ➤ 2. The term ‘Biodiversity’ was popularized by

(a) Robert May (b) A. Von Humboldt (c) Edward Wilson (d) Paul Ehrlich

3 ➤ 3. Identify the type/level of biodiversity from the following

(a) Genetic (b) Species (c) Ecological (d) All of these

4 ➤ 4. Which of the following shows maximum genetic diversity?

(a) Rice (b) Mango (c) Rauwolfi a vomitoria (d) Wheat

5 ➤ 5. How many diff erent varieties of mango are found in India?

6 ➤ 6. How many genetically diff erent strains of rice are found in India?

7 ➤ 7. Choose the correct statement from the following.
(A) Western Ghats have a greater amphibian species diversity than the Eastern Ghats.
(B) Diversity exists at all levels of biological organization ranging from macromolecules within cells to biomes.
(C) Rauwolfi a Vomitoria shows genetic variation in terms of potency and concentration of the reserpine produced.
(D) Norway has greater ecosystem diversity than India.

(a) A and B only (b) B and D only (c) A, B and C only (d) D only

8 ➤ 8. If the present rate of species losses continues, we will lose our biological wealth in how much time?

(a) Less than one century (b) Less than 2 centuries (c) Less than 50 years (d) Next 20 years

9 ➤ 9. Robert May places the global species diversity at about _________ million.

(a) 2 (b) 3 (c) 6 (d) 7

10 ➤ 10. More than _________ % of all species recorded are animals.

(a) 60 (b) 70 (c) 90 (d) 10

11 ➤ 11. Arrange the following in their decreasing order of species.
Fishes, Birds, Reptiles, Amphibian

(a) Fishes > Birds > Reptiles > Amphibian (b) Fishes > Reptiles > Birds > Amphibian (c) Reptiles > Fishes > Birds > Amphibian (d) Amphibian > Fishes > Birds > Reptiles

12 ➤ 12. Which of the following have more number of species?

(a) Fungi (b) Mosses (c) Angiosperm (d) Lichens

13 ➤ 13. Which order is correct with respect to the number of species?

(a) Fungi > Algae > Lichens > Angiosperm (b) Angiosperm > Fungi > Algae > Lichen (c) Fungi > Angiosperm > Algae > Lichen (d) Mosses > Ferns > Algae > Lichens

14 ➤ 14. What does A, B, C, D, E and F represent in this figure?

p-chart for number of species of major taxa of plants.

(a) A: Ferns and allies, B: Mosses, C: Algae, D: Fungi, E: Lichens, F: Angiosperms (b) A: Fungi, B: Mosses, C: Lichens, D: Ferns and allies, E: Angiosperms, F: Algae (c) A: Angiosperms, B: Ferns and allies, C: Fungi, D: Lichens, E: Algae, F: Mosses (d) A: Mosses, B: Ferns and allies, C: Angiosperms, D: Lichens, E: Algae, F: Fungi

15 ➤ 15. Find the false statement.

(a) The number of fungi species is more than the combined total of the species of fishes,amphibians, reptiles and mammals. (b) Conventional taxonomic methods are not suitable for identifying microbial species. (c) For many taxonomic groups, species inventories are more complete in temperate than in tropical countries. (d) Insects forms 70 per cent part of all the species recorded.

16 ➤ 16. Find the true statement.
A. If we consider biochemical or molecular criteria for microorganisms, their diversity may run into millions.
B. There are 12 mega diversity countries in the world.
C. If we accept May’s global estimates, only 32 per cent of the total species have been recorded so far.
D. Western Ghats have a greater amphibian species diversity than Eastern Ghats.

(a) A and B only (b) D only (c) A and D only (d) A, B and D only

17 ➤ 17. India has only _ percent of the world’s land area; its share of the global species diversity is an impressive _ percent.

(a) 4.2, 1.8 (b) 2.4, 8.1 (c) 2.4, 13 (d) 4.2, 13

18 ➤ 18. Match Column-I (Place) with Column-II (Number of bird species).
1. Colombia - A. 1200
2. New York - B. 1300
3. India - C. 1400
4. Amazonian rain forest - D. 105

(a) A:3, B:4, C:2, D:1 (b) A:2, B:1, C:4, D:3 (c) A:2, B:4, C:3, D:1 (d) A:3, B:4, C:1, D:2

19 ➤ 19. Find the incorrect statement.

(a) India has nearly 45,000 species of plants and twice as many animals. (b) A forest in a tropical region like equator has 10 times as many species of vascular plants as a forest of equal area in a temperate region like the mid west of the USA. (c) Greenland 71° N has only 56 species of birds. (d) The diversity of plant and animals is uniform throughout the world.

20 ➤ 20. The largely tropical Amazonian rain forest in South America has the greatest biodiversity on earth. It is the home for more than _____ species of plants. _ of fishes, _ of birds, _ of mammals, _ of amphibians, _ of reptiles and of more than _____ invertebrates.

(a) 30,000, 4000, 1200, 427, 427, 387, 1,25,000 (b) 40,000, 3000, 1200, 427, 427, 387, 1,25,000 (c) 40,000, 3000, 1300, 427, 427, 378, 1,25,000 (d) 40,000, 3000, 1200, 427, 427, 378, 1,25,000

21 ➤ 21. What is the sum of the number of species of birds in New York 41° N and Greenland of 71° N.

(a) 112 (b) 161 (c) 170 (d) 56

22 ➤ 22. Species richness of tropics is because of

(a) Tropics have more evolutionary time. (b) Tropics have relatively constant environment. (c) Tropics receive more solar energy. (d) All the above

23 ➤ 23. Species–area relationship was provided by

(a) Alexander Van Humboldt (b) Robert May (c) Paul Ehrlich (d) Edward Wilson

24 ➤ 24. The graph formed by plotting species richness against area for a wide variety of taxa (angiosperm plants, birds, bats, fresh water fishes, etc.) turns out to be a

(a) Parabola (b) Straight line (c) Rectangular hyperbola (d) Any of the above

25 ➤ 25. log S = log C + Z log A (Logarithmic formula for species–area relationship). True about this formula

(a) S = Species richness A = Area (b) Z = Regression coefficient (c) C = Y-intercept (d) All of these

26 ➤ 26. If we analyze species–area relationship among very large area like entire continents, slope of line becomes

(a) Less steeper (b) Vertical (c) Much steeper (d) Horizontal

27 ➤ 27. Z-value in a much steeper slope ranges between

(a) 0.6 to 1.2 (b) 0.1 to 1.2 (c) 0.01 to 0.02 (d) 0.6 to 0.12

28 ➤ 28. For frugivorous (fruit-eating) birds and mammals in the tropical forests of different continents, the slope of species–area relationship is foud to be approximately

(a) 0.6 (b) 1.3 (c) 1.15 (d) 1

29 ➤ 29. Which is the correct formula of the graph shown below? Given :
S-species richness
A-Area
C-Y-intercept
Z-Slope of line (regression coefficient)

(a) S = CA^Z (b) S = CZ^A (c) S = ZC^A (d) Z = SC^A

30 ➤ 30. ‘Z’ value in species–area relationship lies in the rage of 0.1 to 0.2 for

(a) Plants in Britain (b) Birds in California (c) Molluscs in New York State (d) All of these

31 ➤ 31. Which of the followings are the features of a stable community?

(a) Resistant or resilient to occasional disturbances (Natural or Anthropogenic). (b) Does not show much variation in productivity. (c) Resistant to invasion by alien species. (d) All the above

32 ➤ 32. There are two plots Plot ‘1’ has less species and Plot ‘2’ has more species. Which statement is true regarding the two plots?

(a) Plot ‘1’ shows less year to year variation in total biomass. (b) Plot ‘2’ is less resistant to natural disturbance. (c) Plot ‘1’ has more productivity than plot ‘2’. (d) Plot ‘2’ has more productivity than plot ‘1’.

33 ➤ 33. Rivet popper hypothesis was proposed by

(a) Robert May (b) A. Von Humboldt (c) Paul Ehrlich (d) Edward Wilson

34 ➤ 34. Tropical environments, unlike temperate ones, are

(a) Less seasonal (b) Relatively more constant (c) More predictable (d) All of these

35 ➤ 35. Find the incorrect statement.

(a) Constant environment promote niche specialization. (b) Key species are those which derive major ecosystem functions. (c) Increase in diversity generally increases productivity. (d) Increased steepness in species–area relationship curve decreases species richness in a given area.

36 ➤ 36. The colonization of tropical Pacific Islands by humans led to the extinction of more than, _________ species of native birds

(a) 2000 (b) 50 (c) 4000 (d) 3000

37 ➤ 37. IUCN Red list (2004) documents the extinction of how many species in last 500 years?

(a) 784 (b) 874 (c) 478 (d) 487

38 ➤ 38. Match the Column- I (Recently extinct animals) with Column-II (Places from where they are extinct).
A. Dodo - 1. Russia
B. Quagga - 2. Australia
C. Thylacine - 3. Africa
D. Steller’s sea cow - 4. Mauritius

(a) A:1, B:2, C:3, D:4 (b) A:4, B:3, C:2, D:1 (c) A:4, B:2, C:3, D:1 (d) A:4, B:1, C:2, D:3

39 ➤ 39. Find the false statement.
(A) In the last 20 years alone there is a disappearance of 27 species.
(B) Three species (Bali, Javan and Caspian) of tiger are included in recently extinct animals.
(C) If we apply May’s estimate then there are probably more than 1,00,000 plant species in India that are yet to be discovered and described.
(D) There is more solar energy available in tropics, which contribute to higher productivity; this in turn contributes directly to greater diversity.

(a) A only (b) C, D only (c) B, D only (d) A and C only

40 ➤ 40. According to the IUCN Red list (2004) how many vertebrates became extinct in the last 550 years?

(a) 359 (b) 338 (c) 487 (d) 87

41 ➤ 41. According to IUCN Red list (2004) how many invertebrates became extinct in the last 500 years?

(a) 359 (b) 338 (c) 784 (d) 87

42 ➤ 42. Which group is most vulnerable to extinction?

(a) Fishes (b) Amphibians (c) Reptiles (d) Birds

43 ➤ 43. Approximately how many species face the threat of extinction?

(a) 3000 (b) 1500 (c) 15,500 (d) 70,000

44 ➤ 44. Presently _____ % of all bird species, _ % of all mammals species, _ % of all amphibian species and _____ % of all gymnosperm species in the world face the threat of extinction.

(a) 23, 32, 12, 31 (b) 12, 23, 32, 31 (c) 12, 23, 31, 32 (d) 23, 12, 32, 81

45 ➤ 45. Since the origin and diversification of life on earth how many episodes of mass extinction of species have occurred till date?

(a) 2 (b) 3 (c) 4 (d) 5

46 ➤ 46. What is A, B, C and D in this figure?

p-chart for number of species of major taxa of vertebrates

(a) A: Mammals, B: Birds, C: Reptiles, D: Amphibians (b) A: Amphibians, B: Birds, C: Mammals, D: Reptiles (c) A: Reptiles, B: Amphibians, C: Birds, D: mammals (d) A: Mammals, B: Reptiles, C: Birds, D: Amphibians

47 ➤ 47. The current rate of species extinction is how many times faster than the pre-human time?

(a) 10 to 50 times (b) 100 to 1000 times (c) 1000 to 10,000 times (d) 10,000 to 1,00,000 times

48 ➤ 48. Find the incorrect statement.

(a) ‘Sixth extinction’ is different from previous extinction in terms of rate of extinction. (b) Ecologist warn that if the present trend of extinction continues, nearly 50 per cent all species on earth might be wiped out within the next 100 years. (c) Amphibians appear to be vulnerable to extinction. (d) Recent extinction is completely natural.

49 ➤ 49. Loss of biodiversity in a region may lead to

(a) Decline in plants production. (b) Lowered resistance to environmental perturbations such as draught. (c) Increased variability in certain ecosystem processes such as plant productivity, water use,and pest and disease cycle. (d) All the above

50 ➤ 50. Which of the following is a major cause of loss of biodiversity?

(a) Habitat loss and fragmentation (b) Over-exploitation (c) Alien species invasion (d) Co-extinction

51 ➤ 51. The most dramatic examples of habitat loss comes from the

(a) Tropical rain forests (b) Temperate forests (c) Grasslands (d) Deserts

52 ➤ 52. Find the incorrect statement from the following.
(A) Tropic rain forests cover around 6 per cent of earth’s land surface.
(B) Amazonian rain forest is being cut and cleared for soya bean cultivation or for conversion to grasslands for raising beef cattle.
(C) Animals with migratory habits are badly affected by habitat loss and fragmentation.
(D) Mammals and birds require small territories.

(a) A and B only (b) A and D only (c) D only (d) B and C only

53 ➤ 53. Steller’s sea cow and Passenger pigeon became extinct due to

(a) Alien species invasion (b) Co-extinction (c) Habitat loss and fragmentation (d) Over exploitation

54 ➤ 54. Which of these are examples of alien species invasion?

(a) Nile perch was introduced in Lake Victoria in east Africa (b) African catfish in Indian River (c) Water hyacinth in India (d) All the above

55 ➤ 55. Which of these are invasive weeds?

(a) Carrot grass (Parthenium) (b) Gandhari (lantana) (c) Water hyacinth (Eicchornia) (d) All of these

56 ➤ 56. Co-extinction means

(a) Introduction of alien species leading to decline or extinction of indigenous species. (b) Extinction due to over exploitation. (c) Extinction due to Habitat loss. (d) Extinction due to obligatory association of plant or animal.

57 ➤ 57. Which of these is not a narrowly utilitarian argument for conserving biodiversity?

(a) Food (b) Medicine (c) Construction material (d) Pollination

58 ➤ 58. All are examples of broadly utilitarian except

(a) Pollination (b) Oxygen (c) Aesthetic pleasure of walking through thick woods (d) Firewood

59 ➤ 59. Find the incorrect statement from the following.

(a) Introduction of Nile perch in Lake Victoria in east Africa lead to the extinction of more than 200 species of cichlid fish in the lake. (b) Fast dwindling Amazon forest is estimated to produce, through photosynthesis, 20 per cent of the total oxygen in the earth’s atmosphere. (c) More than 25 per cent of drugs currently sold worldwide are derived from plants. (d) Illegal introduction of American catfish Clarias gariepinus for aquaculture purpose is posing threat to indigenous cat fishes in our rivers.

60 ➤ 60. ‘We save the entire forest to save the tiger’. This approach of conservation is

(a) In situ (b) Ex situ (c) In vitro (d) In vivo

61 ➤ 61. What percentage of the earth’s land area is covered by all biodiversity hotspots put together?

(a) 6% (b) 10% (c) 2% (d) 15%

62 ➤ 62. The following are examples of ex situ conservation except

(a) Zoological parks (b) Botanical garden (c) Wildlife safari parks (d) Biosphere reserve

63 ➤ 63. The following are examples of In situ conservation except?

(a) Biosphere reverse (b) National park (c) Sacred groves (d) Gene-bank

64 ➤ 64. Hotspots are characterized by

(a) Very high species richness (b) High degree of endemism (c) Region of accelerated habitat loss (d) All of these

65 ➤ 65. In India, ecologically unique and biodiversity rich regions are legally protected as

(a) Biosphere reserve (b) National park (c) Sanctuaries (d) All of these

66 ➤ 66. The Earth Summit (Historic Convention on Biological Diversity) was held in

(a) Johannesburg, South Africa, 2002 (b) Rio De Janeiro, 1992 (c) Kyoto, Japan (d) Montreal, Canada

67 ➤ 67. World Summit on sustainable development was held in

(a) Johannesburg, South Africa, 2002 (b) Rio De Janeiro, 1992 (c) Kyoto, Japan (d) Montreal, Canada

68 ➤ 68. Which of these are hotspots of India?

(a) Western Ghats (b) Himalaya (c) Indo-Burma (d) All of these

69 ➤ 69. Ex situ conservation includes

(a) Cryopreservation of gametes (b) In vitro fertilization (c) Tissue culture (d) All of these

70 ➤ 70. The reasons for biodiversity conservation are

(a) Broad utilization (b) Narrow utilization (c) Ethical (d) All of these

71 ➤ 71. The following are broadly utilitarian except

(a) Pest control (b) Flood control (c) Climate moderation (d) Pharmaceuticals

72 ➤ 72. In the World Summit on sustainable development held in 2002 in Johannesburg, South Africa, how many countries pledged their commitment to achieve a significant reduction in the current rate of biodiversity loss at global, regions and local levels, by 2010?

(a) 100 (b) 180 (c) 190 (d) 200

73 ➤ 73. Sacred groves are present in

(a) Khasi and Jaintia Hills in Meghalaya (b) Aravalli Hills of Rajasthan (c) Western Ghat regions of Karnataka and Maharashtra (d) All the above

74 ➤ 74. How do ecologists estimate the total number of species present in the world?

(a) By counting them all. (b) By counting the number of any one species and applying this to various genus. (c) By making statistical comparison of the temperate–tropical species richness of an exhaustively studied group of insects and extrapolating this ratio to other group of animals and plants. (d) By calculating biomass of all the species.

75 ➤ 75. The species diversity of plants (22%) is much less than that of animals (72%), what could be the explanation to how animals achieved greater diversification?

(a) Animal are non-motile. (b) Their movement to diverse habitats resulted in more evolutionary changes occurring in animals. (c) Animals use carbohydrate and lipid as a source of energy. (d) Animal DNA is different from plant DNA in terms of type of nitrogen bases.

76 ➤ 76. Which extinction is presently in progress?

(a) Fifth (b) Sixth (c) Forth (d) Third

77 ➤ 77. Identify A, B, C and D in this figure.
p-chart for the number of species of major taxa of Invertebrates

(a) A: Insects, B: Crustaceans, C: Molluscs, D: Other animal groups (b) A: Other animal groups, B: Molluscs, C: Crustaceans, D: Insects (c) A: Molluscs, B: Insects, C: Other animal groups, D: Crustaceans (d) A: Insects, B: Molluscs, C: Crustaceans, D: Other animal groups

78 ➤ 78. Which of the following require large territories?

(a) Birds (b) Amphibians (b) Mammals (d) Both (a) and (c)

79 ➤ 79. Presently which of the following face maximum threat of extinction?

(a) Birds (b) Amphibians (c) Mammals (d) Gymnosperm

80 ➤ 80. Loss of biodiversity in a region leads to increase in variability in certain ecosystem processes like

(a) Plant productivity (b) Water use (c) Pest and disease cycle (d) All of these

81 ➤ 81. Gametes of threatened species can be preserved in viable and fertile condition for long periods using

(a) PCR technique (b) CTAB (c) Cryopreservation technique (d) In situ conservation

82 ➤ 82. At present, how many biosphere reserves does India have?

(a) 11 (b) 14 (c) 17 (d) 20

83 ➤ 83. How many biodiversity hotspots are found in the world?

(a) 25 (b) 34 (c) 9 (d) 20

84 ➤ 84. Hotspot is a region of

(a) Endemism (b) Accelerated habitat loss (c) Low level of species richness (d) Both (a) and (b)

85 ➤ 85. The following are direct benefits from biodiversity except

(a) Firewood (b) Fibre (c) Food (d) Pollination

86 ➤ 86. The following are indirect benefits from biodiversity except

(a) Pest control (b) Climate moderation (c) Flood control (d) Dyes, resins and perfumes

87 ➤ 87. Which area of M.P. (Madhya Pradesh) contain sacred groves?

(a) Sarguja (b) Chanda (c) Bastar (d) All of these

88 ➤ 88. Find the incorrect match.

(a) Pollinator – Bees, Bumblebees, Bats and Birds (b) Legally protected biodiversity rich region – Biosphere reserve, National park, wildlife sanctuaries, sacred groves (c) Lung of planet – Amazonian rain forest (d) Rivet popper hypothesis – Harvard ecologist Paul Ehrlich

89 ➤ 89. Stellar’s Sea cow became extinct from

(a) Mauritius (b) Africa (c) Russia (d) Australia

90 ➤ 90. Strict protection of hotspots can reduce ongoing mass extinction by

(a) 20% (b) 30% (c) 40% (d) 50%

Your Score is

KALVISOLAI.NET

NCERT CLASS 12 | TOPIC : BIODIVERSITY AND CONSERVATION | QB-1 | NEET BIOLOGY ONLINE TEST

NCERT CLASS 12 | TOPIC : BIODIVERSITY AND CONSERVATION | QB-1 | NEET BIOLOGY ONLINE TEST

It contains 90 important questions. Choose the most correct answer. Then check your answer. Try again if there are errors. Regards : kalvisolai.net

1 ➤ 1. Match Column-I (organism) with Column-II(number of species).1. Ants A. 20,0002. Orchids B. 25,0003. Fishes C. 28,0004. Beetles D. 3,00,000

2 ➤ 2. The term ‘Biodiversity’ was popularized by

3 ➤ 3. Identify the type/level of biodiversity from the following

4 ➤ 4. Which of the following shows maximum genetic diversity?

5 ➤ 5. How many diff erent varieties of mango are found in India?

6 ➤ 6. How many genetically diff erent strains of rice are found in India?

8 ➤ 8. If the present rate of species losses continues, we will lose our biological wealth in how much time?

9 ➤ 9. Robert May places the global species diversity at about _________ million.

10 ➤ 10. More than _________ % of all species recorded are animals.

11 ➤ 11. Arrange the following in their decreasing order of species.Fishes, Birds, Reptiles, Amphibian

12 ➤ 12. Which of the following have more number of species?

13 ➤ 13. Which order is correct with respect to the number of species?

14 ➤ 14. What does A, B, C, D, E and F represent in this figure? p-chart for number of species of major taxa of plants.

15 ➤ 15. Find the false statement.

17 ➤ 17. India has only _________ percent of the world’s land area; its share of the global species diversity is an impressive _________ percent.

18 ➤ 18. Match Column-I (Place) with Column-II (Number of bird species).1. Colombia - A. 1200 2. New York - B. 13003. India - C. 14004. Amazonian rain forest - D. 105

19 ➤ 19. Find the incorrect statement.

21 ➤ 21. What is the sum of the number of species of birds in New York 41° N and Greenland of 71° N.

22 ➤ 22. Species richness of tropics is because of

23 ➤ 23. Species–area relationship was provided by

24 ➤ 24. The graph formed by plotting species richness against area for a wide variety of taxa (angiosperm plants, birds, bats, fresh water fishes, etc.) turns out to be a

25 ➤ 25. log S = log C + Z log A (Logarithmic formula for species–area relationship). True about this formula

26 ➤ 26. If we analyze species–area relationship among very large area like entire continents, slope of line becomes

27 ➤ 27. Z-value in a much steeper slope ranges between

28 ➤ 28. For frugivorous (fruit-eating) birds and mammals in the tropical forests of different continents, the slope of species–area relationship is foud to be approximately

29 ➤ 29. Which is the correct formula of the graph shown below? Given : S-species richness A-Area C-Y-intercept Z-Slope of line (regression coefficient)

30 ➤ 30. ‘Z’ value in species–area relationship lies in the rage of 0.1 to 0.2 for

31 ➤ 31. Which of the followings are the features of a stable community?

32 ➤ 32. There are two plots Plot ‘1’ has less species and Plot ‘2’ has more species. Which statement is true regarding the two plots?

33 ➤ 33. Rivet popper hypothesis was proposed by

34 ➤ 34. Tropical environments, unlike temperate ones, are

35 ➤ 35. Find the incorrect statement.

36 ➤ 36. The colonization of tropical Pacific Islands by humans led to the extinction of more than, _________ species of native birds

37 ➤ 37. IUCN Red list (2004) documents the extinction of how many species in last 500 years?

38 ➤ 38. Match the Column- I (Recently extinct animals) with Column-II (Places from where they are extinct).A. Dodo - 1. RussiaB. Quagga - 2. AustraliaC. Thylacine - 3. AfricaD. Steller’s sea cow - 4. Mauritius

40 ➤ 40. According to the IUCN Red list (2004) how many vertebrates became extinct in the last 550 years?

41 ➤ 41. According to IUCN Red list (2004) how many invertebrates became extinct in the last 500 years?

42 ➤ 42. Which group is most vulnerable to extinction?

43 ➤ 43. Approximately how many species face the threat of extinction?

44 ➤ 44. Presently _________ % of all bird species, _________ % of all mammals species, _________ % of all amphibian species and _________ % of all gymnosperm species in the world face the threat of extinction.

45 ➤ 45. Since the origin and diversification of life on earth how many episodes of mass extinction of species have occurred till date?

46 ➤ 46. What is A, B, C and D in this figure? p-chart for number of species of major taxa of vertebrates

47 ➤ 47. The current rate of species extinction is how many times faster than the pre-human time?

48 ➤ 48. Find the incorrect statement.

49 ➤ 49. Loss of biodiversity in a region may lead to

50 ➤ 50. Which of the following is a major cause of loss of biodiversity?

51 ➤ 51. The most dramatic examples of habitat loss comes from the

53 ➤ 53. Steller’s sea cow and Passenger pigeon became extinct due to

54 ➤ 54. Which of these are examples of alien species invasion?

55 ➤ 55. Which of these are invasive weeds?

56 ➤ 56. Co-extinction means

57 ➤ 57. Which of these is not a narrowly utilitarian argument for conserving biodiversity?

58 ➤ 58. All are examples of broadly utilitarian except

59 ➤ 59. Find the incorrect statement from the following.

60 ➤ 60. ‘We save the entire forest to save the tiger’. This approach of conservation is

61 ➤ 61. What percentage of the earth’s land area is covered by all biodiversity hotspots put together?

62 ➤ 62. The following are examples of ex situ conservation except

63 ➤ 63. The following are examples of In situ conservation except?

64 ➤ 64. Hotspots are characterized by

65 ➤ 65. In India, ecologically unique and biodiversity rich regions are legally protected as

66 ➤ 66. The Earth Summit (Historic Convention on Biological Diversity) was held in

67 ➤ 67. World Summit on sustainable development was held in

68 ➤ 68. Which of these are hotspots of India?

69 ➤ 69. Ex situ conservation includes

70 ➤ 70. The reasons for biodiversity conservation are

71 ➤ 71. The following are broadly utilitarian except

72 ➤ 72. In the World Summit on sustainable development held in 2002 in Johannesburg, South Africa, how many countries pledged their commitment to achieve a significant reduction in the current rate of biodiversity loss at global, regions and local levels, by 2010?

73 ➤ 73. Sacred groves are present in

74 ➤ 74. How do ecologists estimate the total number of species present in the world?

75 ➤ 75. The species diversity of plants (22%) is much less than that of animals (72%), what could be the explanation to how animals achieved greater diversification?

76 ➤ 76. Which extinction is presently in progress?

77 ➤ 77. Identify A, B, C and D in this figure. p-chart for the number of species of major taxa of Invertebrates

78 ➤ 78. Which of the following require large territories?

79 ➤ 79. Presently which of the following face maximum threat of extinction?

80 ➤ 80. Loss of biodiversity in a region leads to increase in variability in certain ecosystem processes like

81 ➤ 81. Gametes of threatened species can be preserved in viable and fertile condition for long periods using

1 ➤ 1. Match Column-I (organism) with Column-II(number of species).
1. Ants A. 20,000
2. Orchids B. 25,000
3. Fishes C. 28,000
4. Beetles D. 3,00,000

11 ➤ 11. Arrange the following in their decreasing order of species.
Fishes, Birds, Reptiles, Amphibian

14 ➤ 14. What does A, B, C, D, E and F represent in this figure?

p-chart for number of species of major taxa of plants.

17 ➤ 17. India has only _ percent of the world’s land area; its share of the global species diversity is an impressive _ percent.

18 ➤ 18. Match Column-I (Place) with Column-II (Number of bird species).
1. Colombia - A. 1200
2. New York - B. 1300
3. India - C. 1400
4. Amazonian rain forest - D. 105

29 ➤ 29. Which is the correct formula of the graph shown below? Given :
S-species richness
A-Area
C-Y-intercept
Z-Slope of line (regression coefficient)

38 ➤ 38. Match the Column- I (Recently extinct animals) with Column-II (Places from where they are extinct).
A. Dodo - 1. Russia
B. Quagga - 2. Australia
C. Thylacine - 3. Africa
D. Steller’s sea cow - 4. Mauritius

44 ➤ 44. Presently _____ % of all bird species, _ % of all mammals species, _ % of all amphibian species and _____ % of all gymnosperm species in the world face the threat of extinction.

46 ➤ 46. What is A, B, C and D in this figure?

p-chart for number of species of major taxa of vertebrates

77 ➤ 77. Identify A, B, C and D in this figure.
p-chart for the number of species of major taxa of Invertebrates