The biological species concept is the most widely accepted species concept. It defines species in terms of interbreeding. For instance, Ernst Mayr defined a species as follows:species are groups of interbreeding natural populations that are reproductively isolated from other such groups..The biological species concept explains why the members of a species resemble one another, i.e. form phenetic clusters, and differ from other species.When two organisms breed within a species, their genes pass into their combined offspring.he biological species concept explains why the members of a species resemble one another, i.e. form phenetic clusters, and differ from other species. When two organisms breed within a species, their genes pass into their combined offspring.
conduit - a passage (a pipe or tunnel) through which water or electric wires can pass; the computers were connected through a system of conduits. aqueduct - a conduit that resembles a bridge but carries water over a valley. duct - an enclosed conduit for a fluid.
An electrical conduit is a tube used to protect and route electrical wiring in a building or nonbuilding structure.Electrical conduit may be made of metal, plastic, fiber, or fired clay. Most conduit is rigid, but flexible conduit is used for some purposes.ini trunking is a term used in the UK for small form-factor (usually 6 mm to 25 mm square or rectangle sectioned) PVC wireways. In North American practice, wire trough and lay-in wireways are terms used to designate similar products. Wall duct raceway is the name give to the type that can be enclosed in a wall.