Among the ecosystem mentioned below, where can one find maximum biodiversity?
1. | Mangroves | 2. | Desert |
3. | Coral reefs | 4. | Alpine meadows |
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The active chemical drug reserpine is obtained from:
1. | Datura | 2. | Rauwolfia |
3. | Atropa | 4. | Papaver |
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Which of the following group exhibit more species diversity?
1. | Gymnosperms | 2. | Algae |
3. | Bryophytes | 4. | Fungi |
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Which of the below-mentioned regions exhibit less seasonal variations?
1. | Tropics | 2. | Temperate |
3. | Alpines | 4. | Both (1) & (2) |
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What is common to the techniques (i) in vitro fertilization, (ii) Cryo preservation, and (iii) tissue culture?
1. All are in situ conservation
2. All are ex situ conservation methods
3. All require ultra-modern equipment and large space.
4. All are methods of conservation of extinct organisms.
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Assertion (A): | Genetic diversity serves as a way for populations to adapt to changing environments. |
Reason (R): | Genetic diversity is the total number of genetic characteristics in the genetic makeup of a species. |
In the light of the above statements, choose the most appropriate answer from the options given below :
1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
3. | (A) is true but (R) is false. |
4. | Both (A) and (R) are false. |
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Assertion (A): | Large islands near the mainland will have more species than smaller islands more distant from the mainland. |
Reason (R): | The species richness of an island is determined by colonization and extinction. |
In the light of the above statements, choose the most appropriate answer from the options given below :
1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
3. | (A) is true but (R) is false. |
4. | Both (A) and (R) are false. |
Assertion (A): | Endemic organisms with limited ranges are most affected by habitat destruction. |
Reason (R): | These organisms are not found anywhere else in the world, and thus have less chance of recovering. |
In the light of the above statements, choose the most appropriate answer from the options given below :
1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
3. | (A) is true but (R) is false. |
4. | Both (A) and (R) are false. |
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To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
Assertion (A): | Pollution may cause extinction debt - future extinction of species due to events in the past. |
Reason (R): | Extinction debt occurs because of time delays between impacts on a species, such as destruction of habitat, and the species' ultimate disappearance. |
In the light of the above statements, choose the most appropriate answer from the options given below :
1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
3. | (A) is true but (R) is false. |
4. | Both (A) and (R) are false. |
Assertion (A): | The indirect effects of losing many species as well as the diversity of ecosystems in general are enormous. |
Reason (R): | When biodiversity is lost, the environment loses many species that perform valuable and unique roles in the ecosystem. |
1. | Both (A) and (R)are true and (R) is the correct explanation of the (A). |
2. | Both(A) and (R) are true but (R) is not the correct explanation of the (A). |
3. | (A) is true but (R) is false. |
4. | Both (A) and (R) are false. |