Biology explained visually

Biology is full of processes that are invisible to the naked eye and hard to picture from a textbook diagram: a cell copying its DNA, a mitochondrion releasing energy, an immune cell recognising a virus, a population slowly changing over generations. Know.it's biology lessons animate these processes, so you watch the strands of DNA unzip, the chromosomes line up during mitosis and the carbon dioxide turn into sugar inside a leaf.

This page brings together our free biology explainers — cells and their parts, DNA, genes and inheritance, photosynthesis and respiration, evolution and natural selection, microbes and the immune system, and ecosystems. There are also comparisons for the pairs students confuse most, like DNA vs RNA and mitosis vs meiosis. Every card opens a short written explanation. Visual lessons can be requested using available credits or plan allowance.

It's a quick way to revise a chapter before an exam or finally understand something that never made sense in class. Ask any biology question and learn it in English, Hindi, Marathi, Tamil, Telugu, Hinglish and Minglish, depending on your plan and selected lesson options.