Biology Xii-Notes & Solved problems is an Android app developed by Learn Hub Studio that provides a complete study guide for students studying biology in the twelfth grade. The app is free to use and falls under the Education & Reference category, specifically under Books.

The app covers a range of topics, including Homeostasis, Support and Movement, Coordination and Control, Reproduction, Growth and Development, Chromosomes and DNA, Cell Cycle, Variation and Genetics, Biotechnology, Evolution, Ecosystem, Some Major Ecosystem, and Man and His Environments. Each chapter contains solved problems and notes to help students understand the concepts better.

In addition to the comprehensive study guide, the app also offers a free online quiz to test the student's knowledge. The app's interface is easy to navigate, and the content is well-organized, making it a useful tool for students who want to learn and revise biology concepts.