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A. 75%
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B. 99.9%
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C. 90%
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D. 50%
Explanation
It is estimated that about 99.9% of all species that have ever existed on Earth are now extinct.
This figure underscores the vast extent of extinction events throughout:
- Earth's history
- reflects the dynamic
- often unstable nature of life on the planet.
The remaining 0.1% of species are the ones that are still extant today.
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A. Endangered
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B. Threatened
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C. None of these
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D. Wild
Explanation
Species facing imminent extinction are called endangered.
Specifically, an endangered species is at very high risk of extinction soon, either globally or within a specific region.
انواع _________ معدوم ہو جاتی ہیں اگر وہ اتنی کم تعداد پر برقرار رہیں کہ دوسری انواع پر ان کا اثر نہ ہونے کے برابر ہو۔
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A. Endemically
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B. Locally
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C. None of these
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D. Ecologically
Explanation
- Ecologically extinct species exist in such small numbers that they no longer play a significant role in their ecosystem.
- Their interactions with other species become negligible, impacting ecosystem balance.
جن انواع کو جنگلی میں معدوم ہونے کا خطرہ بہت زیادہ ہوتا ہے ان کو کیا کہتے ہیں؟
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A. Critically endangered (CR)
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B. None of these
-
C. Extinct in the wild (EW)
-
D. Endangered (EN)
Explanation
- Species categorized as Critically Endangered (CR) face an extremely high risk of extinction in the wild according to the IUCN Red List.
- This category includes species with severely declining populations, very limited geographic ranges, or other critical threats.
آئی یو سی این ریڈ لسٹ سسٹم _____ میں شروع کیا گیا تھا؟
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A. 1963
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B. 1980
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C. 970
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D. None of these
Explanation
- The IUCN Red List System was initiated in 1963.
- Its primary purpose is to assess the conservation status of species.
- The system provides information on the extinction risk of species.
- It helps to raise awareness about species' conservation needs.
- The list categorizes species based on their vulnerability, such as "Endangered," "Vulnerable," or "Critically Endangered."
- This categorization guides conservation efforts aimed at protecting species.
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