Easy to construct the three dimensional model of DNA. Emphasizing the base pair sequence and function of DNA, the sturdy, colorful bases snap together in the correct sequence, and the pairs attach to a center rod representing hydrogen bonds.
Dandelion (Taraxacum Officinale), Dandelion belongs to the Asteraceae family of composite flowers. Characterized by numerous florets arranged in a dense inflorescence that is contained by overlapping green bracts that open and close to protect the flower
Deluxe Functional Knee Joint, This high-quality deluxe functional knee joint model with ligaments shows the anatomy and possible physiological movements of the human knee joint. This model clearly demonstrates abductions, anteversion, retroversion