Class XI Biology

Currently Playing: Virus - Part 1 | Biological classification | Grade 11 | Biology | Khan Academy

They’re tiny—so tiny that even bacteria look huge in comparison! Welcome to the world of viruses! But what exactly are they? Are they alive or just biological imposters? How do they hijack a host and multiply without even having cells of their own? And why do they change so quickly, making it hard to fight them? In this two-part deep dive, we unravel their mysteries using “V.I.R.U.S” as a fun way to remember key concepts. From their microscopic size to their rapid spread, each part uncovers a new layer of these fascinating entities. 00:00 - Introduction 00:20 - Size of the virus (Very, very small) 03:50 - Biologically non-living (Inert! Biologically) 06:27 - Genetic material (RNA or DNA) Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now! https://www.khanacademy.org/science/in-in-class-11-biology-india 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