According to Alexander von Humboldt :

1. Species richness decreases with increasing area of exploration
2. Species richness increases with the increasing area, but only up to a limit
3. There is no relationship between species richness and the area explored
4. Species richness goes on increasing with increasing area of exploration

Subtopic:  Biodiversity Patterns |
 82%
From NCERT
NEET - 2020
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In the following, in each set, a conservation approach and an example of a method of conservation are given.

(a) In-situ conservation - Biosphere Reserve
(b) Ex-situ conservation - Sacred groves
(c) In-situ conservation - Seed bank
(d) Ex-situ conservation - Cryopreservation

Select the option with the correct match of approach and method:

1. (a) and (c) 2. (a) and (d)
3. (b) and (d) 4. (a) and (b)
Subtopic:  In Situ Conservation of Biodiversity | Ex Situ Conservation of Biodiversity |
 82%
From NCERT
NEET - 2020
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Sacred groves are especially useful in:
1. preventing soil erosion
2. year-round flow of water in rivers
3. conserving rare and threatened species
4. generating environmental awareness

Subtopic:  In Situ Conservation of Biodiversity |
 88%
From NCERT
AIPMT - 2012
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Biodiversity of a geographical region represents:

1. Species endemic to the region
2. Endangered species found in the region
3. The diversity in the organisms living in the region
4. Genetic diversity is present in the dominant species of the region.
Subtopic:  Introduction & Types |
 75%
From NCERT
AIPMT - 2011
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One of the most important functions of botanical gardens is that:

1. They allow ex-situ conservation of germplasm

2. They provide the natural habitat for wildlife

3. One can observe tropical plants there

4. They provide a beautiful area for recreation

Subtopic:  Ex Situ Conservation of Biodiversity |
 68%
From NCERT
AIPMT - 2005
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Reason for elimination of wild life is:
1.  Deforestation
2.  Forest fire
3.  Floods
4.  Less Rain fall

Subtopic:  Loss of Biodiversity |
 95%
From NCERT
AIPMT - 1998
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Main reason for disturbance of biological diversity:
1.  Greenhouse effect
2.  Hunting
3.  Soil erosion
4.  Destruction of natural habitats

Subtopic:  Loss of Biodiversity |
 95%
From NCERT
AIPMT - 1999
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Best method to preserve the wild relatives of plants:
1.  By growing them in natural habitats
2.  Gene library
3.  By storing seeds
4.  Cryopreservation

Subtopic:  In Situ Conservation of Biodiversity |
From NCERT
AIPMT - 1999
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Species diversity is maximum in:
1.  Tropical rain forests
2.  Temperate forests
3.  Deserts
4.  Hill slopes

Subtopic:  Magnitude of Biodiversity |
 94%
From NCERT
AIPMT - 1999
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The number of wildlife is continuously decreasing. What is the main reason for this:

1. Predation

2. Cutting down of forest

3. Destruction of habitat

4. Hunting

Subtopic:  Loss of Biodiversity |
 77%
From NCERT
AIPMT - 2002
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