Answer:
superconductor
- noun: superconductor; plural noun: superconductors a substance capable of becoming superconducting at sufficiently low temperatures. a substance in the superconducting state. "as they are cooled through a critical temperature, they suddenly become superconductors"
insulator- noun: insulator; plural noun: insulators
a substance which does not readily allow the passage of heat or sound. "cotton is a poor insulator" a substance or device which does not readily conduct electricity. a block of material, typically glass or ceramic, enclosing a wire carrying an electric current where it crosses a support.
conductor- noun: conductor; plural noun: conductors 1. a person who directs the performance of an orchestra or choir. "he was appointed principal conductor of the Berlin Philharmonic Orchestra" 2. BRITISH a person in charge of a train, streetcar, or other public conveyance, who collects fares and sells tickets. 3. PHYSICS a material or device that conducts or transmits heat, electricity, or sound, especially when regarded in terms of its capacity to do this. "graphite is a reasonably good conductor of electricity" another term for lightning rod.
semiconductor- noun: semiconductor; plural noun: semiconductors a solid substance that has a conductivity between that of an insulator and that of most metals, either due to the addition of an impurity or because of temperature effects. Devices made of semiconductors, notably silicon, are essential components of most electronic circuits.
These are the definitions off of google. Bye :)
This type of natural selection is referred to as directional selection. In this type of natural selection, either one phenotype is preferred or the other; therefore, there is no equilibrium between the populations of the phenotypes that are present.
Examples of organisms that have undergone directional selection are black bears during the ice ages, African chichlid and sockey salmon.
Answer:
except natural killer cells.
Explanation:
The Helper T cells produce cytotoxic T cells and help B cells, but not natural killer cells
Yes you need to call another ambulance because you need to take care of someone with a broken arm , head injury (also unconscious) you would need another ambulance to check on the pregnant woman and man with cuts and scratches.
