Explanation: Apparent magnitude is a phrase used by astronomers to describe how bright an object appears in the sky from earth. The magnitude scale today is based on Hipparchus' system. The brighter an object appears, the lower its magnitude.
Absolute magnitude is the magnitude a star would have if it was placed at a distance of 10 parsecs from Earth.
B - They both use protein channels (I think so at least) they differ because active transports use a pump to leave the cell and it uses atp (cell energy).
Proteins help in the development of muscle, acts in the immune
system and also as enzymes. They are considered as a <span>class of nitrogenous
organic compounds that are comprise of large molecules which contains one or
more long chains of amino acids and are a vital portion of all active
organisms.</span>
