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. |
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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. |
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Assertion (A): | Non-native introduced species always have a negative impact on the ecosystem in which they have been introduced. |
Reason (R): | Non-native species always become invasive in the introduced 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. |
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Assertion (A): | Conserving the biological diversity of the ecological hotspots is very important component of efforts to safeguard the world’s biological heritage. |
Reason (R): | The hotspots of biodiversity cover a large percentage of the land area of earth. |
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): | Ex-situ conservation, while helpful in humankind's efforts to sustain and protect our environment, is rarely enough to save a species from extinction. |
Reason (R): | It is to be used as a last resort, or as a supplement to in-situ conservation. |
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): | Biosphere reserves attempt to achieve three interconnected functions: conservation, development and logistic support. |
Reason (R): | They are legally protected areas where no human activity is allowed. |
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 current mass extinction is different from the previous episodes of mass extinctions. |
Reason (R): | It is happening at a faster rate and is mainly anthropogenic in nature. |
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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Consider three sample areas with the following composition:
Sample area I: | has three species of birds, two are represented by one individual each and the third by four individuals |
Sample area II: | has three species of birds, each represented by two individuals |
Sample area III: | has a species of insects, a species of mammals and a species of birds, each with two individuals |
Which area will be considered as the most diverse?
1. Sample area I
2. Sample area II
3. Sample area III
4. Sample area II and Sample area III are equally diverse
Regarding the gradients of biodiversity:
I: | As we move from poles to the equator, broadly speaking, biodiversity decreases. |
II: | There is an increase in species diversity from lower to higher altitudes. |
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
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