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Q. No.Habitat loss and fragmentation, over-exploitation, alien species invasion and co-extinction are causes for :
1. Natality
2. Population explosion
3. Competition
4. Biodiversity loss
Subtopic: Loss of Biodiversity |
92%
From NCERT
NEET - 2022
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Which of the following is not a method of ex situ conservation?
| 1. | Cryopreservation | 2. | In vitro fertilization |
| 3. | National Parks | 4. | Micropropagation |
Subtopic: Ex Situ Conservation of Biodiversity |
77%
From NCERT
NEET - 2022
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In-situ conservation refers to:
| 1. | Conserve only extinct species |
| 2. | Protect and conserve the whole ecosystem |
| 3. | Conserve only high risk species |
| 4. | Conserve only endangered species |
Subtopic: In Situ Conservation of Biodiversity |
78%
From NCERT
NEET - 2022
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Which of the following come under the "Evil Quarter"?
(a) Habitat loss and fragmentation
(b) Over-exploitation
(c) Alien species invasion
(d) Mortality
(e) Competition
Choose the correct answer from the options given below:
| 1. | (a), (c) and (d) | 2. | (b), (c) and (d) |
| 3. | (a), (b) and (c) | 4. | (a), (b) and (d) |
Subtopic: Loss of Biodiversity |
94%
From NCERT
NEET - 2022
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Species Area relationship is described by the following equation.
log S = log C + Z log A
where Z is:
1. Area
2. Species richness
3. Slope of the line
4. Y-intercept
Subtopic: Biodiversity Patterns |
78%
From NCERT
NEET - 2022
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Endemism refers to:
1. Species richness
2. Species evenness
3. Species confined to that region
4. Species diversity
Subtopic: Importance of Biodiversity | Loss of Biodiversity |
79%
From NCERT
NEET - 2022
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Extinction is a natural phenomenon. It is estimated that 99% of all species that ever lived are now extinct. Why then do we say that we are now experiencing an extinction (loss of biodiversity) crisis?
1. Humans are ethically responsible for protecting endangered species.
2. Scientists have finally identified most of the species on Earth and are thcurreus able to quantify the number of species becoming extinct.
3. The current rate of extinction is high and human activities threaten biodiversity at all levels.
4. Humans have greater medical needs than at any other time in history, and many potential medicinal compounds are being lost as plant species become extinct.
1. Humans are ethically responsible for protecting endangered species.
2. Scientists have finally identified most of the species on Earth and are thcurreus able to quantify the number of species becoming extinct.
3. The current rate of extinction is high and human activities threaten biodiversity at all levels.
4. Humans have greater medical needs than at any other time in history, and many potential medicinal compounds are being lost as plant species become extinct.
Subtopic: Loss of Biodiversity |
81%
From NCERT
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Which of the following groups is most threatened by global extinctions?
1. mammals
2. birds
3. fish
4. amphibians
1. mammals
2. birds
3. fish
4. amphibians
Subtopic: Loss of Biodiversity |
79%
From NCERT
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The most serious consequence of a decrease in global biodiversity would be the
| 1. | increase in global warming and thinning of the ozone layer |
| 2. | potential loss of ecosystem services on which people depend |
| 3. | increase in the abundance and diversity of edge-adapted species |
| 4. | loss of source of genetic diversity to preserve endangered species |
Subtopic: Loss of Biodiversity |
54%
From NCERT
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In the following questions a statement of assertion (A) is followed by a statement of reason (R).
| Assertion(A): | Sacred forests are refuge of rare, endangered and endemic taxa. |
| Reason(R): | The land of sacred forests is fertile. |
| 1. | Both (A) & (R) are true and (R) is the correct explanation of (A) |
| 2. | Both (A) & (R) are true but (R) is not the correct explanation of (A) |
| 3. | (A) is true statement but (R) is false. |
| 4. | Both (A) and (R) are false statements. |
Subtopic: Ex Situ Conservation of Biodiversity |
62%
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