Mg reducing agent and Cu oxidising agent.
Explanation:
Generally, mating outside of a given population can give different alleles. Mutations and the crossing over of chromatids can add difference to the genetic pool.
Physical property of matter because you don't have to change its chemical make-up to tell, you can observe it using your senses and tools.
The noble gases AKA the column with full outermost valence shells. (Group 18)
