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Biology Exemplar
Class 12
NCERT Exemplar
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Chapter 1: Reproduction in Organisms
48 questions
2
Chapter 2: Sexual Reproduction in Flowering Plants
52 questions
3
Chapter 3: Human Reproduction
48 questions
4
Chapter 4: Reproductive Health
37 questions
5
Chapter 5: Principles of Inheritance and Variation
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6
Chapter 6: Molecular Basis of Inheritance
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7
Chapter 7: Evolution
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Chapter 8: Human Health and Disease
70 questions
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Chapter 9: Strategies for Enhancement in Food Production
77 questions
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Chapter 10: Microbes in Human Welfare
59 questions
11
Chapter 11: Biotechnology: Principles and Processes
48 questions
12
Chapter 12: Biotechnology and its Applications
52 questions
13
Chapter 13: Organisms and Populations
70 questions
14
Chapter 14: Ecosystem
68 questions
15
Chapter 15: Biodiversity and Conservation
61 questions
Q1
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.
Q2
Discuss one example, based on your day-to-day observations, showing how loss of one species may lead to the extinction of another.
Q3
A species area curve is drawn by plotting the number of species against the area. How is it that when a very large area is considered the slope is steeper than that for smaller areas ?
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Chapter 16: Environmental Issues
52 questions
Question
Hard
Solving time: 4 mins
Discuss one example, based on your day-to-day observations, showing how loss of one species may lead to the extinction of another.
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Co-extinction is the extinction of two mutually related or inter-related species for instance a host fish extinction leads to the extinction of all those parasites exclusively found on it. Another example is plant pollinator mutualism, where extinction of one leads to the extinction of other.
Insect, aphids are polyphagous (feed on more than one plant species) or monophagous (feed on a particular species of plant). Monophagous insects may become extinct, if the plant species upon which they feed becomes extinct.
Insect, aphids are polyphagous (feed on more than one plant species) or monophagous (feed on a particular species of plant). Monophagous insects may become extinct, if the plant species upon which they feed becomes extinct.
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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.
Q2
Discuss one example, based on your day-to-day observations, showing how loss of one species may lead to the extinction of another.
Q3
A species area curve is drawn by plotting the number of species against the area. How is it that when a very large area is considered the slope is steeper than that for smaller areas ?
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| Question Text | Discuss one example, based on your day-to-day observations, showing how loss of one species may lead to the extinction of another. |
| Topic | Biodiversity and Conservation |
| Subject | Biology |
| Class | Class 12 |
| Answer Type | Text solution:1 |
| Upvotes | 90 |
