Class 6 Exam  >  Class 6 Notes  >  NCERT Textbooks & Solutions for Class 6  >  NCERT Textbook: Chapter 9 - What Happened to the Reptiles, English, Class 6

NCERT Textbook: Chapter 9 - What Happened to the Reptiles, English, Class 6 | NCERT Textbooks & Solutions for Class 6 PDF Download

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FAQs on NCERT Textbook: Chapter 9 - What Happened to the Reptiles, English, Class 6 - NCERT Textbooks & Solutions for Class 6

1. What are reptiles?
Ans. Reptiles are a class of cold-blooded vertebrates that have scales or scutes on their skin. They are characterized by their ability to lay amniotic eggs, breathe air, and have a well-developed skeleton. Reptiles include animals like snakes, lizards, crocodiles, and turtles.
2. Why did reptiles become extinct?
Ans. Reptiles did not become entirely extinct. However, many species of reptiles, especially the large ones, faced extinction during the Mesozoic era. This was primarily due to the changing environmental conditions, including climate change and the emergence of new predators. Additionally, competition with other evolving species and changes in food availability also contributed to their decline.
3. How did the extinction of reptiles impact the ecosystem?
Ans. The extinction of reptiles during the Mesozoic era had a significant impact on the ecosystem. As reptiles were important predators and herbivores, their decline led to changes in the food chain and disrupted the balance of the ecosystem. This allowed other species to thrive and fill the ecological niches previously occupied by reptiles.
4. Are there any surviving relatives of reptiles today?
Ans. Yes, there are surviving relatives of reptiles today. Birds are considered to be the closest living relatives of reptiles. They share a common ancestor and exhibit several characteristics similar to reptiles, such as laying eggs, having scales on their legs, and having a similar skeletal structure. Birds evolved from a group of reptiles known as theropods.
5. How do reptiles adapt to their environment?
Ans. Reptiles have various adaptations that help them survive in their respective environments. Their scaly skin helps in reducing water loss, enabling them to live in arid regions. They are also capable of regulating their body temperature through behavioral adaptations like basking in the sun or seeking shade. Additionally, their ability to lay amniotic eggs allows them to reproduce on land, reducing their dependency on water bodies for reproduction.
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