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Question
Match column I with column II and choose the correct option.
Column I
Column II
A. Caspian
1. Rauwolfia
B. Reserpine
2. Extinct tiger subspecies
C. Nile perch in Lake Victoria
3. Vulnerable for extinction
D. Amphibians
4. Alien species
Match column I with column II and choose the correct option.
| Column I | Column II |
| A. Caspian | 1. Rauwolfia |
| B. Reserpine | 2. Extinct tiger subspecies |
| C. Nile perch in Lake Victoria | 3. Vulnerable for extinction |
| D. Amphibians | 4. Alien species |
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Solution
The correct option is B A-2, B-1, C-4, D-3
Our Earth is highly biodiverse which means it harbours a variety of species.
Even a single species exhibits high diversity in their genetic makeup. Rauwolfia vomitoria growing in different Himalayan ranges exhibits diversity with respect to the chemical compound (reserpine) it produces. The plant species shows high variations in the potency and concentration of the chemical compound reserpine.
However, such rich biodiversity is declining presently because of human activities.
Alien species invasion is one of the reasons for the loss of biodiversity loss. Any new species that has been introduced deliberately into a geographical region is known as an alien species. Such species may cause decline or extinction of the indigenous species. Nile perch is an example of one such alien species which was introduced in Lake Victoria of East Africa. It started feeding on cichlid fishes which were native to that lake and it eventually led to the extinction of more than 200 species of cichlid fish in the lake.
An international organisation called International Union for Conservation of Nature (IUCN) has published the Red Data list of endangered and extinct species. According to IUCN (2004), 784 species of organisms have become extinct in the last 500 years.
Some recent extinctions include dodo, quagga, thylacine, Steller’s sea cow and three subspecies of tiger (Bali, Javan, Caspian).
Presently, 12% of all bird species, 23% of all mammal species, 31% of all gymnosperm species and 32% of all amphibian species in the world face the threat of extinction.
Amphibians are more vulnerable to extinction. The amphibians (frogs, toads and salamanders) are disappearing because of habitat loss, pollution, climate change, introduced exotic species, and diseases.
Hence, option b is correct.
Column I
Column II
A. Caspian
2. Extinct tiger subspecies
B. Reserpine
1. Rauwolfia
C. Nile perch in Lake Victoria
4. Alien species
D. Amphibians
3. Vulnerable for extinction
Our Earth is highly biodiverse which means it harbours a variety of species.
Even a single species exhibits high diversity in their genetic makeup. Rauwolfia vomitoria growing in different Himalayan ranges exhibits diversity with respect to the chemical compound (reserpine) it produces. The plant species shows high variations in the potency and concentration of the chemical compound reserpine.
However, such rich biodiversity is declining presently because of human activities.
Alien species invasion is one of the reasons for the loss of biodiversity loss. Any new species that has been introduced deliberately into a geographical region is known as an alien species. Such species may cause decline or extinction of the indigenous species. Nile perch is an example of one such alien species which was introduced in Lake Victoria of East Africa. It started feeding on cichlid fishes which were native to that lake and it eventually led to the extinction of more than 200 species of cichlid fish in the lake.
An international organisation called International Union for Conservation of Nature (IUCN) has published the Red Data list of endangered and extinct species. According to IUCN (2004), 784 species of organisms have become extinct in the last 500 years.
Some recent extinctions include dodo, quagga, thylacine, Steller’s sea cow and three subspecies of tiger (Bali, Javan, Caspian).
Presently, 12% of all bird species, 23% of all mammal species, 31% of all gymnosperm species and 32% of all amphibian species in the world face the threat of extinction.
Amphibians are more vulnerable to extinction. The amphibians (frogs, toads and salamanders) are disappearing because of habitat loss, pollution, climate change, introduced exotic species, and diseases.
Hence, option b is correct.
| Column I | Column II |
| A. Caspian | 2. Extinct tiger subspecies |
| B. Reserpine | 1. Rauwolfia |
| C. Nile perch in Lake Victoria | 4. Alien species |
| D. Amphibians | 3. Vulnerable for extinction |
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