Renal agenesis. Renal agenesis is a medical condition in which one (unilateral) or both (bilateral) fetal kidneys fail to develop.
Polycrystalline cells are composed of multiple silicon crystals, which is a cheaper way to manufacture solar modules. Put simply, these cells are easier for a factory to produce, so they are less expensive. Polycrystalline cells are made by several methods, but most commonly with a cast of molten silicon.
Polyethylene is a lightweight thermoplastic made from hydrocarbons. Low-density polyethylene (LDPE) is the most widely used plastic. It is relatively inexpensive, flexible, stâ¦rong, and chemical-resistant, and can be molded molded into bottles, food packaging, and plastic toys.