Grade 11 Biology
Curated by: Khan Academy India - English (3 videos)
What makes reptiles the first true land vertebrates? In this video, we explore their evolutionary roots from amniotes and uncover the four key adaptations that helped them thrive on land: efficient locomotion, dry scaly skin, well-developed lungs, and amniotic eggs. We end with a closer look at some fascinating reptiles found across India. Dive into the world of scales, sun, and survival! 00:00 - Introduction 00:54 - Origin 01:27 - Amniote 02:15 - True land vertebrate - adaptation 02:29 - Locomotion 03:59 - Skin 05:07 - Moulting 05:38 - Cross-section of reptile skin 07:00 - Breathing 08 24 - Heart 09:33 - Reproduction 09:41 - internal fertilisation 10:26 - ovipary 11:03 - Amniotic egg 12:46 - Direct development 13:20 - Cold-blooded animals 14:10 - Examples of reptiles Khan Academy India is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We have videos and exercises that have been translated into multiple Indian languages, and 15 million people around the globe learn on Khan Academy every month. Support Us: https://india.khanacademy.org/donate Created by Vandhana Ashok