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
Naked yoga 2: Disorderly Conduct) that outlaws public nudity in that city without a parade permit. Naked yoga Naked yoga (Sanskrit "nagna yoga" or "vivastra yoga") is the practice of yoga without clothes. While many practice naked yoga at home and in nature, there are a growing number of participants in group classes. The practice is gaining popularity, notably in western societies that have more familiarity with social nudity. Naked yoga should be considered in relation to the dress code at yoga courses, varying from different times and yoga directions. Yoga has been practiced naked since ancient times. In the Bhagavata Purana