Students create a dichotomous key. In this categorizing instructional activity, students create a dichotomous key for different types of cereal. Students classify the cereal into groups such as flakes and cereal with holes. Students...

Since evolution favors genetic variability what prevents pollen from fertilizing its own eggs? This effective site presents answers to this question.

This annotated slideshow adapted from KET's Electronic Field Trip to the Forest illustrates how blight decimated the American chestnut tree and the methods scientists use to identify and pollinate the remaining trees to create...