In humans, the reduction division results in two sperm cells each with 23 chromosomes or an egg cell with 23 chromosomes and one discarded polar body. The second division or meiosis II is called equational division.
A feedstock is defined as any renewable, biological material that can be used directly as a fuel, or converted to another form of fuel or energy product. Biomass feedstocks are the plant and algal materials used to derive fuels like ethanol, butanol, biodiesel, and other hydrocarbon fuels.
More complex plastics, like the polystyrenes, or polyesters replace a hydrogen atom with a benzene ring or some arrangement of atoms, nearly always itself drawn from petrochemical feedstocks. Whatever the plastic, the feedstock and the industry's energy requirements are at present exclusively derived from oil and gas.