Growing degree-day. Growing degree days (GDD), also called growing degree units (GDUs), are a heuristic tool in phenology. GDD are a measure of heat accumulation used by horticulturists, gardeners, and farmers to predict plant and animal development rates such as the date that a flower will bloom, an insect will emerge from dormancy, or a crop will reach maturity.
Cystic fibrosis is a genetic condition caused by a faulty gene (known as the CFTR gene). The CFTR gene normally creates a protein that moves salt and water out of a cell.If the CFTR gene is defective, it results in a build-up of thick, sticky mucus in the body's tubes and passageways.ystic fibrosis is a genetic condition caused by a faulty gene (known as the CFTR gene). The CFTR gene normally creates a protein that moves salt and water out of a cell.
Cystic Fibrosis is an autosomal recessive genetic disorder characterized by severe lung damage and nutritional deficiencies. Mutations in the cystic fibrosis transmembrane conductance regulator (CFTR) gene causes the body to produce thick, sticky secretions that obstruct passageways in the lungs and pancreas leading to:ystic Fibrosis is an autosomal recessive genetic disorder characterized by severe lung damage and nutritional deficiencies. Mutations in the cystic fibrosis transmembrane conductance regulator (CFTR) gene causes the body to produce thick, sticky secretions that obstruct passageways in the lungs and pancreas leading to: