Among the ecosystem mentioned below, where can one find maximum biodiversity?
1. | Mangroves | 2. | Desert |
3. | Coral reefs | 4. | Alpine meadows |
The active chemical drug reserpine is obtained from:
1. | Datura | 2. | Rauwolfia |
3. | Atropa | 4. | Papaver |
Which of the following group exhibit more species diversity?
1. | Gymnosperms | 2. | Algae |
3. | Bryophytes | 4. | Fungi |
Which of the below-mentioned regions exhibit less seasonal variations?
1. | Tropics | 2. | Temperate |
3. | Alpines | 4. | Both (1) & (2) |
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. |
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. |
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. |
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. |