31. A basal trait is the coarse serration . 32. Human uses of serration have copied, and gone beyond, those found in nature. 33. Seedling leaves are much more delicate and a lighter green with serrations along the edge. 34. The sickle blades feature fairly uniform serrations , which made the harvesting of grain easier. 35. The reason for this being most of the cutting takes place in the serrations themselves. 36. They grow up to 30cm wide and the margins are entire ( no serration ). 37. The point of the leaf base to the first serration is almost a straight line. 38. This would then be torn off, using the serrations incorporated into the top cover. 39. Stealth airframes sometimes display distinctive serrations on some exposed edges, such as the engine ports. 40. Both the jaws and the mandibles have sharp hooks and serrations to hold on to prey.
