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Species diversity decreases as we move away from the equator t
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
Describe the consumptive use value of biodiversity as food, drugs and medicines, fuel and fibre with suitable examples.
Q2
Species diversity decreases as we move away from the equator towards the poles. What could be the possible reasons?
Q3
Explain briefly the ‘rivet popper hypothesis’ of Paul Ehrlich.
View all question
16

Chapter 16: Environmental Issues

52 questions

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Question
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Species diversity decreases as we move away from the equator towards the poles. What could be the possible reasons?

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Biology Exemplar (NCERT Exemplar)

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Species diversity decreases as we move away from the equator towards the poles. What could be the possible reasons?
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Species diversity decreases as we move towards the poles, because-
(i)   Temperature decreases and conditions become harsh.
(ii)   Both the amount and intensity of solar radiation decreases.
(iii)   Vegetation decreases.
(iv)   Less resources available to support species.
Speciation is generally a function of time and environmental stability, so if conditions are too harsh, it is difficult for the species to survive and adapt. This results in decrease in biodiversity towards the poles.
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Question Text
Species diversity decreases as we move away from the equator towards the poles. What could be the possible reasons?
TopicBiodiversity and Conservation
SubjectBiology
ClassClass 12
Answer TypeText solution:1
Upvotes109