How the Snake Lost Its Legs the butterfly, the snake, and the cheetah. Each consists of three to eight sections named in the style of Rudyard Kipling's "Just So Stories", with titles like "How the butterfly got its spots" or "How the snake elongated its body", though a couple of sections use "Why?" rather than "How?", as in "Why the fly twirls his penis" (it rotates during embryonic development under the control of different genes). In these chapters, Held explains the mechanics of evolutionary developmental biology, complete with accounts of what genes such as hox, hedgehog, and engrailed do to shape bodies. The third part is
Leopard (pattern) Leopard (pattern) A leopard pattern is a spotted color pattern, particularly in the hair coat or skin of animals, but can also describe spotting patterns in plants and fabrics. The term refers to the black and gold spotted coat of the leopard cat, but is used to describe many color combinations that result in spots scattered randomly across the skin or hair coat of other animals. Examples of animals with coloring patterns termed "leopard" include many great cats in the genus "Panthera", the leopard frog, the "leopard" spotting pattern in the Appaloosa and Knabstrupper breeds of horses, the leopard seal,