1. Coursera: Introduction to Biology - The Secret of Life This course is offered by MIT and explores the basic principles of biochemistry, genetics, molecular biology, and other topics. Link here
2. Khan Academy: Biology This resource offers a wide range of topics in biology. The content is organized by topic and includes both articles and video lectures. Link here
3. edX: AP Biology - Part 1: The Cell This course focuses on the biology of the cell, including its structure and function. It is part of a series of courses designed to prepare students for the AP Biology exam. Link here
4. Udemy: Molecular and Cell Biology This course covers the structure and function of the cell, including DNA, RNA, and protein synthesis. It is suitable for both beginners and those with some background in biology. Link here
5. MIT OpenCourseWare: Introductory Biology This resource offers lecture notes, exams, and videos from an introductory biology course at MIT. Topics include biochemistry, genetics, and molecular biology. Link here
6. Crash Course: Biology This YouTube series offers a fast-paced and entertaining introduction to biology, covering everything from the structure and function of cells to evolution and ecology. Link here
7. iBiology: Bringing Biology to Life iBiology offers free biology videos from the world's leading scientists, spanning a wide range of topics and complexity levels from high school to postgraduate. Link here
8. edX: Principles of Evolution, Ecology and Behavior This course is from Yale University. It provides a broad understanding of the fundamentals of evolution, ecology, and behavior in an integrative way. Link here

Please note that while these resources are freely accessible, some might require payment for additional features such as certification or access to quizzes and exams. It is always recommended to check the details on each platform. Additionally, the specific URLs and availability of these courses might change over time, as they are controlled by the individual platform providers.

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