Biodiversity loss is now one of the world’s most pressing crisis. The primary reason for this is that:
1. | we cannot do anything about it |
2. | we are not responsible for this loss |
3. | we still do not know its entire extent |
4. | it is only affecting the developing countries |
The now extinct thylacine was a native of:
1. | Mauritius | 2. | Africa |
3. | Australia | 4. | Russia |
Identify the incorrectly matched pair:
1. |
Dodo |
Mauritius |
2. |
Quagga |
Africa |
3. |
Thylacine |
Australia |
4. |
Stellar’s sea cow |
USA |
Table I | |||
A | B | ||
C | D |
Table II | |||
P | Thylacine | Q | Dodo |
R | Quagga | S | Steller’s sea cow |
A | B | C | D | |
1. | Q | R | S | P |
2. | Q | R | P | S |
3. | P | Q | R | S |
4. | P | S | Q | R |
Which of the following species of tiger has not gone extinct?
1. | Bali | 2. | Javan |
3. | Caspian | 4. | Siberian |
Which group, amongst the following, has the maximum percentage of species facing threat of extinction?
1. | Amphibians | 2. | Birds |
3. | Mammals | 4. | Gymnosperms |
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. |
Loss of biodiversity may lead to all except:
1. | decline in plant production |
2. | increased resistance to environmental perturbance |
3. | increased variability in water use |
4. | increased variability in pest and disease cycle |
At present, the most important cause driving animals and plants to extinction is:
1. | Co-extinctions | 2. | Alien species invasions |
3. | Over-exploitation | 4. | Habitat loss and fragmentation |
Consider the given two statements:
I: | Fragmentation of habitat is an important cause of extinction of species. |
II: | Minor fluctuations in climate, resources or other factors can be catastrophic in small, isolated populations. |
1. Both I and II are correct and II explains I.
2. Both I and II are correct but II does not explain I.
3. I is correct but II is incorrect.
4. I is incorrect but II is correct.