Seed are sometimes sold commercially while still enclosed within the hard wall of the fruit, which must be split open to reach the seed. Different groups of plants have other modifications, the so-called stone fruits (such as the peach) have a hardened fruit layer (the endocarp) fused to and surrounding the actual seed. Nuts are the one-seeded, hard-shelled fruit of some plants with an indehiscent seed, such as an acorn or hazelnut. Seeds are produced in several related groups of plants, and their manner of production distinguishes the angiosperms ("enclosed seeds") from the gymnosperms ("naked seeds"). Angiosperm seeds are produced in
Motovilikha Plants Motovilikha Plants Motovilikha Plants (; ) is a Russian metallurgical and military equipment manufacturer. In 2016 Motovilikha Plants joined NPO Splav, a Rostec company. It is named after the former town of Motovilikha, where it's located, which in 1938 was amalgamated into the city of Perm. The town in turn was named after the eponymous river, a small Kama tributary. The plant was established in 1736, when Empress Anna ordered the establishment of a smelter to produce steel for the nearby factories that existed at the time, supplying steel blocks for the manufacture of rifles and guns. By the late