Q. No.The sixth mass extinction differs from previous ones because it is primarily caused by:
| 1. | Volcanic eruptions |
| 2. | Human activities like habitat destruction and climate change |
| 3. | Asteroid impacts |
| 4. | Natural selection |
Subtopic: Loss of Biodiversity |
94%
Level 1: 80%+
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Which of the following forests is known as the "Lungs of the planet Earth?
| 1. | Taiga forest |
| 2. | Tundra forest |
| 3. | Amazon rain forest |
| 4. | Rainforests of North-East India |
Subtopic: Loss of Biodiversity |
98%
Level 1: 80%+
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Nile perch, Carrot grass and Water hyacinth are all examples of:
1. Keystone species
2. Ecotypes
3. Sibling species
4. Invasive species
1. Keystone species
2. Ecotypes
3. Sibling species
4. Invasive species
Subtopic: Loss of Biodiversity |
90%
Level 1: 80%+
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Currently the most important cause driving animals and plants to extinction is:
1. Habitat loss and fragmentation
2. Alien species invasions
3. Over-exploitation
4. Co-extinctions
1. Habitat loss and fragmentation
2. Alien species invasions
3. Over-exploitation
4. Co-extinctions
Subtopic: Loss of Biodiversity |
90%
Level 1: 80%+
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Subtopic: Loss of Biodiversity |
96%
Level 1: 80%+
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Main reason for disturbance of biological diversity:
1. Greenhouse effect
2. Hunting
3. Soil erosion
4. Destruction of natural habitats
Subtopic: Loss of Biodiversity |
95%
Level 1: 80%+
AIPMT - 1999
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Loss of biodiversity in a region may lead to
| 1. | Decline in plants production |
| 2. | Lowered resistance to environmental perturbations such as draught. |
| 3. | Increased variability in certain ecosystem process such as plant productivity, water use, and pest and disease cycle |
| 4. | All of these |
Subtopic: Loss of Biodiversity |
95%
Level 1: 80%+
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Which of the following come under the "Evil Quarter"?
| (a) | Habitat loss and fragmentation | (b) | Over-exploitation |
| (c) | Alien species invasion | (d) | Mortality |
| (e) | Competition | ||
Choose the correct answer from the options given below:
| 1. | (a), (c) and (d) | 2. | (b), (c) and (d) |
| 3. | (a), (b) and (c) | 4. | (a), (b) and (d) |
Subtopic: Loss of Biodiversity |
94%
Level 1: 80%+
NEET - 2022
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The decline in the population of Indian native fishes due to the introduction of Clarias gariepinus in the river Yamuna can be categorised as:
| 1. | Co-extinction |
| 2. | Habitat fragmentation |
| 3. | Over-exploitation |
| 4. | Alien species invasion |
Subtopic: Loss of Biodiversity |
92%
Level 1: 80%+
NEET - 2019
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Red List contains data or information on?
1. all economically important plants
2. plants whose products are in international trade
3. threatened species
4. marine vertebrates only
Subtopic: Loss of Biodiversity |
94%
Level 1: 80%+
NEET - 2016
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