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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
52 questions
6
Chapter 6: Molecular Basis of Inheritance
71 questions
7
Chapter 7: Evolution
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Chapter 8: Human Health and Disease
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Chapter 9: Strategies for Enhancement in Food Production
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Chapter 10: Microbes in Human Welfare
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Chapter 11: Biotechnology: Principles and Processes
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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
Discuss one example, based on your day-to-day observations, showing how loss of one species may lead to the extinction of another.
Q2
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 ?
Q3
Is it possible that productivity and diversity of a natural community remain constant over a time period of, say one hundred years?
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Chapter 16: Environmental Issues
52 questions
Question
Hard
Solving time: 4 mins
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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In very large areas, the number of species is much more that is why the curve is much steeper. This is because the larger area has more, food availability and other resources, so obviously more species may thrive.
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Practice more questions from Biology Exemplar (NCERT Exemplar)
Q1
Discuss one example, based on your day-to-day observations, showing how loss of one species may lead to the extinction of another.
Q2
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 ?
Q3
Is it possible that productivity and diversity of a natural community remain constant over a time period of, say one hundred years?
View allPractice questions from Biology Exemplar (NCERT Exemplar)
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Practice more questions from Biodiversity and Conservation
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Ans. Option (B) is correct.
Reason (R) : Tropical environments, unlike temperate ones, are less seasonal, relatively more constant and predictable.
(A) Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).
(B) Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).
(C) Assertion (A) is true but reason (R) is false.
(D) Assertion (A) is false but reason (R) is true.
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| Question Text | 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 ? |
| Topic | Biodiversity and Conservation |
| Subject | Biology |
| Class | Class 12 |
| Answer Type | Text solution:1 |
| Upvotes | 87 |
