Shaker exercise. 1  Lay flat on the floor or a bed. 2  Lift your head as if you are looking at your toes. 3  Hold your head in this position for 10 seconds. Increase the amount of time until you can hold it for 1 minute.  Lift your head and lay it back down (do not hold it up.) Repeat this movement 30 times.
Bud. Definition. noun, plural: buds. (general) An immature or undeveloped structure that develops into a bodily structure or a new individual. (biology) A small outgrowth from the parent organism, which becomes a new individual; a gemma. (botany) A small swelling or protuberance on a stem or branch of a plant, containing the undeveloped shoot, leaf, or flower. (zoology) A weaned calf on its first year, and whose horns are beginning to bud or form.
It is a group of four things, like cells, spores, anything biological. I would recommend looking at Wikipedia for more examples. . A tetrad is a group of four. It may refer to: Tetrad (chromosomal formation) Tetrad (genetics), the four spores of a yeast; Tetrad (general relativity), a mathematical frame of reference in general relativity; Tetrad (index notation), a concept in differential geometry; Tetrad (music), a set of four notes; Tetrad (symbol) or tetractys; Tetrad (unit of area) Tetrad, a group of four haploid and immature pollen grains in tetrahedral fashion produced by meiotic microsporogenesis Tetrad (astronomy), an occurrence of 4 total lunar eclipses in a row with intervals of 6 lunations .