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Biology Midterm Exam

In this video, Salman Khan of Khan Academy explains DNA.

This is a simple, but clean diagram of asexual reproduction of cells. You can clearly see chromosomes, as well as easily define the different stages.

This is a great website for students just beginning to learn about meiosis. There are no ads, and the site is sharp, clean, with great diagrams and explanations.

An extensive online interactive resource for learning about various aspects of biology.