Match List-I with List-II: Choose the correct answer from the options given below:List-I List-II (A) Dodo (I) Russia (B) Quagga (II) Australia (C) Thylacine (III) Mauritius (D) Stellar’s Sea cow (IV) Africa
(A)-(III), (B)-(IV), (C)-(II), (D)-(I)
Understanding Extinct Animals and Their Native Habitats
This question asks us to match a list of extinct animals with their native regions. Understanding the natural habitats of these animals helps us learn about biodiversity and the impact of extinction.
Let's analyze each animal and its corresponding native region:
- Dodo: The Dodo (Raphus cucullatus) was a flightless bird native to the island of Mauritius. Mauritius is located in the Indian Ocean, east of Madagascar.
- Quagga: The Quagga (Equus quagga quagga) was a subspecies of the plains zebra, native to South Africa. It is now extinct. South Africa is part of the continent of Africa.
- Thylacine: The Thylacine (Thylacinus cynocephalus), also known as the Tasmanian Tiger, was a large carnivorous marsupial native to Australia, Tasmania, and New Guinea. It is widely believed to be extinct.
- Stellar’s Sea Cow: The Stellar’s Sea Cow (Hydrodamalis gigas) was a large, herbivorous marine mammal. It was found in the nearshore areas of the Bering Sea between Alaska and Russia. Specifically, it was native to the Commander Islands, which are part of Russia.
Based on this information, we can create the following matches:
- (A) Dodo matches with (III) Mauritius
- (B) Quagga matches with (IV) Africa (specifically South Africa)
- (C) Thylacine matches with (II) Australia (including Tasmania)
- (D) Stellar’s Sea Cow matches with (I) Russia (Commander Islands)
This gives us the matching pattern: (A)-(III), (B)-(IV), (C)-(II), (D)-(I).
Matching Extinct Animals to Regions
Here is a table summarizing the correct matches:
| List-I (Extinct Animal) | List-II (Native Region) | Match |
|---|---|---|
| (A) Dodo | (III) Mauritius | (A)-(III) |
| (B) Quagga | (IV) Africa | (B)-(IV) |
| (C) Thylacine | (II) Australia | (C)-(II) |
| (D) Stellar’s Sea Cow | (I) Russia | (D)-(I) |
Comparing this with the given options, the pattern (A)-(III), (B)-(IV), (C)-(II), (D)-(I) corresponds to one of the choices.
Revision Table: Extinct Species and Origin
| Extinct Animal | Native Region | Approximate Extinction Year |
|---|---|---|
| Dodo | Mauritius | Late 17th Century |
| Quagga | South Africa (Africa) | Late 19th Century |
| Thylacine (Tasmanian Tiger) | Australia, Tasmania, New Guinea | Mid-20th Century (Last confirmed sighting 1936) |
| Stellar’s Sea Cow | Commander Islands (Russia) | Late 18th Century |
Additional Information: Causes of Extinction
The extinction of species like the Dodo, Quagga, Thylacine, and Stellar’s Sea Cow highlights the impact of human activities on biodiversity. Key factors contributing to their extinction include:
- Habitat Loss: Destruction of natural habitats due to human settlement, agriculture, and development.
- Overhunting/Overexploitation: Direct hunting by humans for food, resources, or due to perceived threats (as in the case of the Thylacine). The Stellar's Sea Cow was heavily hunted for its meat, fat, and hide.
- Introduced Species: Arrival of non-native species (like rats, pigs, dogs) brought by humans, which preyed on native animals or competed for resources. This significantly impacted the Dodo and other island species.
- Disease: Introduction of new diseases by humans or introduced animals.
- Climate Change: Long-term shifts in temperature and weather patterns can alter habitats and affect species survival.
Studying these extinct animals and their native regions helps us understand ecological history and the importance of conservation efforts today to prevent further species loss.
Important Questions from Biotechnology and its Applications
Match List-I with List-II:
List-I List-II (A) Produces crystals of toxic insecticidal proteins (I) Meloidogyne incognita (B) Nematode which infects the roots of tobacco plant (II) Agrobacterium tumefaciens (C) Vector used to transfer the nematode-specific gene into the host plant (III) Bacillus thuringiensis (D) Plasmids used to produce insulin chains (IV) Escherichia coli Choose the correct answer from the options given below:
Identify the statements which hold true for transgenic animals.
(A) Transgenic animals can be used to study vaccine safety.
(B) Over 95% of transgenic animals are mice
(C) Transgenic animals cannot be used to study human diseases
(D) Transgenic animal possesses and express foreign gene
Choose the correct answer from the options given below:
Human protein α-1 antitrypsin is used to treat:
Bacillus thuringiensis produces Bt toxin crystals, it does not kill the bacterium itself as the toxin is in the ______ in bacteria.
Select the correct statements from the following A. The presence of Thymine at the place of Uracil gives more stability to DNA B. Both nucleic acids, i.e., DNA and RNA mutate C. DNA is dependent on RNA for synthesis of proteins D. RNA mutates at a slower rate than DNA E. DNA is a better genetic material
