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): | Biologists are not sure about how many prokaryotic species there might be. |
Reason (R): | A large number of species have not been data based so far. |
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): | There is a steady increase in species richness from the arctic to the tropics. |
Reason (R): | Seasonal variation is substantially more in tropics than in arctics. |
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): | Species diversity contributes to the well-being of an ecosystem. |
Reason (R): | Rich biodiversity contributes to higher productivity of an ecosystem. |
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): | Umbrella species are species selected for making conservation-related decisions. |
Reason(R): | Umbrella species has a disproportionately large effect on its natural environment relative to its abundance. |
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): | In almost all cases, habitat fragmentation leads to species loss. |
Reason (R): | Human alteration of habitat is the single greatest threat to diversity throughout the biosphere. |
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. |