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How is the presently occurring species extinction different fr
Biology Exemplar
Biology Exemplar

Class 12

NCERT Exemplar

Publisher:
NCERT
Subject:
Biology
1

Chapter 1: Reproduction in Organisms

48 questions

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2

Chapter 2: Sexual Reproduction in Flowering Plants

52 questions

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3

Chapter 3: Human Reproduction

48 questions

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4

Chapter 4: Reproductive Health

37 questions

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5

Chapter 5: Principles of Inheritance and Variation

52 questions

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6

Chapter 6: Molecular Basis of Inheritance

71 questions

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7

Chapter 7: Evolution

52 questions

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8

Chapter 8: Human Health and Disease

70 questions

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9

Chapter 9: Strategies for Enhancement in Food Production

77 questions

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10

Chapter 10: Microbes in Human Welfare

59 questions

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11

Chapter 11: Biotechnology: Principles and Processes

48 questions

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12

Chapter 12: Biotechnology and its Applications

52 questions

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13

Chapter 13: Organisms and Populations

70 questions

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14

Chapter 14: Ecosystem

68 questions

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15

Chapter 15: Biodiversity and Conservation

61 questions

Q1
What is common to the species shown in figures A and B?
Q2
How is the presently occurring species extinction different from the earlier mass extinctions ?
Q3
Of the four major causes for the loss of biodiversity (Alien species invasion , habitat loss  and  fragmentation, over-exploitation and co-extinctions) which according to you is the major cause for the loss of biodiversity ? Give reasons in support.
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16

Chapter 16: Environmental Issues

52 questions

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Question
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How is the presently occurring species extinction different from the earlier mass extinctions ?

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Biology Exemplar (NCERT Exemplar)

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In earlier time extinction of species occurred due to natural causes or calamities like flood, volcanic eruption, prolonged drought and landslides, etc. While at present human activities are the major cause of species extinction.
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Q1
What is common to the species shown in figures A and B?
Q2
How is the presently occurring species extinction different from the earlier mass extinctions ?
Q3
Of the four major causes for the loss of biodiversity (Alien species invasion , habitat loss  and  fragmentation, over-exploitation and co-extinctions) which according to you is the major cause for the loss of biodiversity ? Give reasons in support.
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Question Text
How is the presently occurring species extinction different from the earlier mass extinctions ?
TopicBiodiversity and Conservation
SubjectBiology
ClassClass 12
Answer TypeText solution:1
Upvotes116