Q. No.According to Robert May, what is the estimated global species diversity?
1. 20–50 million
2. 10 million
3. 7 million
4. 5 million
1. 20–50 million
2. 10 million
3. 7 million
4. 5 million
Subtopic: Introduction & Types | Biodiversity |
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What does the metaphor "Nature’s biological library is burning even before we catalogued the titles" imply?
| 1. | New species are evolving faster than they can be discovered. |
| 2. | Many species face the risk of extinction before they are even discovered and documented. |
| 3. | Scientists are prioritizing cataloguing over conservation. |
| 4. | There is a growing collection of species in need of conservation. |
Subtopic: Biodiversity |
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Why are estimates of prokaryotic species diversity challenging for biologists?
| 1. | Conventional taxonomic methods are not effective for identifying microbial species, and many are not culturable in labs. |
| 2. | Prokaryotes have limited ecological roles and are not diverse. |
| 3. | Prokaryotes are already well-documented using traditional species identification methods. |
| 4. | Prokaryotes are only found in specific ecosystems, limiting their diversity. |
Subtopic: Biodiversity |
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What statistical approach do biologists use to estimate the total number of species on Earth, especially considering the high species diversity in the tropics?
| 1. | They directly count all tropical species individually. |
| 2. | They assume that temperate regions are representative of global biodiversity. |
| 3. | They count only vertebrate species as a basis for estimation. |
| 4. | They compare temperate and tropical species richness within a well-studied group, then extrapolate to estimate diversity in other groups. |
Subtopic: Introduction & Types | Biodiversity |
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Why is biodiversity conservation considered a vital global issue?
| 1. | Biodiversity loss affects only large mammals and birds. |
| 2. | Only a few countries benefit from maintaining global biodiversity. |
| 3. | Rapid species loss could eliminate nature’s rich diversity in a very short time. |
| 4. | Biodiversity is important mainly for aesthetic appreciation. |
Subtopic: Biodiversity |
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Consider the given two statements:
| Assertion (A): | It is challenging to estimate the exact number of prokaryotic species. |
| Reason (R): | Many prokaryotic species are not culturable under laboratory conditions, and conventional taxonomic methods are unsuitable for identifying microbial species. |
| 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. |
Subtopic: Biodiversity |
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Which of the following is an example of genetic diversity?
| 1. | Different species of plants found in a tropical rainforest |
| 2. | Variation in the potency of reserpine in Rauwolfia vomitoria across different Himalayan ranges |
| 3. | The total number of plant and animal species in a given region |
| 4. | The presence of distinct ecosystems like forests, wetlands, and deserts in a country |
Subtopic: Introduction & Types | Biodiversity |
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Which one of the following shows maximum genetic diversity in India ?
(1) Mango (2) Groundnut (3) Rice (4) Maize
Subtopic: Introduction & Types | Biodiversity |
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Identify the incorrect statement about global biodiversity:
| 1. | More than 70% of all recorded species are animals. |
| 2. | Insects make up less than 50% of all known animal species. |
| 3. | Plants (including algae, fungi, bryophytes, gymnosperms, and angiosperms) make up about 22% of total species. |
| 4. | Angiosperms are more successful than gymnosperms |
Subtopic: Introduction & Types | Biodiversity |
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Why is it difficult to estimate the total number of species on Earth?
| 1. | Tropics contain very few undiscovered species. |
| 2. | Most species have already been fully catalogued globally. |
| 3. | Only temperate species are biologically important. |
| 4. | Species inventories are incomplete, especially in tropical regions. |
Subtopic: Biodiversity |
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