Inaugurated by IN-SPACe
ISRO Registered Space Tutor
S4-SA3-0658
What is an Extinct Species (biology)?
Grade Level:
Class 6
Space Technology, EVs, Climate Change, Biotechnology, HealthTech, Robotics, Chemistry, Physics
Definition
What is it?
An extinct species is a type of animal or plant that no longer exists anywhere on Earth. This means there are no living members of that species left, and they will never be seen again. It's like a team that has stopped playing forever.
Simple Example
Quick Example
Imagine your favourite snack, like a specific flavour of chips, was so popular that everyone bought it, but then the company stopped making it completely. No matter how much you look in shops, you will never find that chip flavour again. That chip flavour is now 'extinct' from the market, just like a species becomes extinct from Earth.
Worked Example
Step-by-Step
Let's understand how we know a species might be extinct:
1. **Step 1: Scientists search.** Imagine there's a special type of frog called the 'Orange-Spotted Frog' that lived only in one forest in India. Scientists used to see many of them.
---
2. **Step 2: Numbers start dropping.** Over time, due to changes in the forest, fewer and fewer Orange-Spotted Frogs were seen.
---
3. **Step 3: No sightings for a long time.** Scientists searched for many, many years – perhaps 50 years – in all the places the frog used to live, using different methods like cameras and listening devices.
---
4. **Step 4: No evidence found.** Even after extensive searching, not a single Orange-Spotted Frog was found, nor any signs of them (like eggs or tadpoles).
---
5. **Step 5: Declaration.** After careful study and no evidence of its existence for a very long time, scientists declare the Orange-Spotted Frog an 'extinct species'.
**Answer:** The Orange-Spotted Frog is now considered an extinct species because no living members have been found for a long period, despite thorough searching.
Why It Matters
Understanding extinct species helps us protect the animals and plants still alive today, just like how understanding past mistakes helps us do better in the future. This knowledge is crucial for environmental scientists, wildlife conservationists, and even people working in biotechnology to find ways to preserve biodiversity.
Common Mistakes
MISTAKE: Thinking that 'endangered' means 'extinct'. | CORRECTION: An endangered species is still alive but has very few members left and is at high risk of becoming extinct. An extinct species has no living members at all.
MISTAKE: Believing extinction only happens to dinosaurs. | CORRECTION: Extinction has happened to many different types of animals and plants throughout Earth's history, not just dinosaurs, and it continues to happen even today.
MISTAKE: Confusing a species that is extinct in one area with being extinct everywhere. | CORRECTION: A species might be 'locally extinct' (gone from one specific region) but still exist in other parts of the world. For a species to be truly 'extinct', it must be gone from the entire planet.
Practice Questions
Try It Yourself
QUESTION: Is a tiger, which has very few numbers left, an extinct species? | ANSWER: No, a tiger is an endangered species, not an extinct one, because there are still tigers alive today.
QUESTION: If scientists haven't seen a particular type of bird for 10 years, can they immediately declare it extinct? Explain why. | ANSWER: No, they cannot immediately declare it extinct. Scientists need to conduct thorough searches over many more years and across all possible habitats to be sure no members of the species exist before declaring it extinct.
QUESTION: The Dodo bird was last seen in the 17th century. Why is it a good example of an extinct species? | ANSWER: The Dodo bird is a good example of an extinct species because no Dodo birds have been seen anywhere on Earth for hundreds of years, and scientists have confirmed its complete disappearance.
MCQ
Quick Quiz
Which of these best describes an extinct species?
A species that is very rare and hard to find
A species that lives only in zoos
A species with no living members left on Earth
A species that has migrated to a new country
The Correct Answer Is:
C
An extinct species means that all individual animals or plants of that species have died out, and none are left anywhere. Options A, B, and D describe species that still exist.
Real World Connection
In the Real World
In India, organisations like the Wildlife Institute of India (WII) and the Zoological Survey of India (ZSI) study animals and plants. They monitor populations and identify species that are endangered or have become extinct. Their work helps in conservation efforts, like protecting national parks and wildlife sanctuaries to prevent more species from disappearing.
Key Vocabulary
Key Terms
EXTINCT: No longer existing anywhere on Earth | ENDANGERED: At high risk of becoming extinct | CONSERVATION: The protection of animals, plants, and natural resources | BIODIVERSITY: The variety of life on Earth
What's Next
What to Learn Next
Now that you understand what an extinct species is, next you can learn about 'Endangered Species'. This will help you understand why some animals and plants are at risk and what we can do to help protect them, just like how we protect our cultural heritage.
