biological species concept. Members of the same species are capable of interbreeding, producing viable offspring, and cannot produce viable offspring with members of other species. This is one of several concepts that define a species, and is the most commonly used and accepted of those concepts.he most common method for species differentiation is the biological species concept, which defines a species as a population of organisms that can interbreed to produce viable, fertile offspring.
Electric current definition. Electrical current is the flow rate of electric charge in electric field, usually in electrical circuit. Using water pipe analogy, we can visualize the electrical current as water current that flows in a pipe. The electrical current is measured in ampere (amp) unit.
Electric current is a flow of electric charge (usually in the form of electrons) through a substance. The substance or conductor that an electric current flows through is often metal wire, although current can also flow through some gases, liquids, and other materials.Circuits can be wired in two ways.In a series circuit, current flows to each bulb in turn. Both bulbs are dimly lit.he substance or conductor that an electric current flows through is often metal wire, although current can also flow through some gases, liquids, and other materials. Circuits can be wired in two ways. In a series circuit, current flows to each bulb in turn. Both bulbs are dimly lit.