You may not know if that zebrafish in your fish tank is a model citizen—but it is definitely a model organism! What can we learn about ourselves from a tiny zebrafish? Discover more about the polygenic trait of skin color through a...

Need an a-maize-ing lesson to show your class how regulatory genes work? If you use the well-written resource, they'll be all ears! Biology scholars discover the gene responsible for the evolution of the modern-day corn plant through a...

Which characteristics make organisms unique? Dichotomous keys simplify the process of classifying organisms by focusing on these unique characteristics. Young scholars learn how to use the dichotomous key flow chart by creating their own...

In this lesson, students study the embryos of different organisms at three stages of development to look for features that suggest a common ancestry.