Reactivity. It is the ability of matter to combine chemically with other substances.
It is a physical change because you can not put it back like it was
Opposites attract, like for example magnets, one is positive and the other is negatively charged, they will attract
The answer is B
Homozygous mean the same and you know that the two alleles will be the same (either BB or bb) and receive is usually the lower case set of alleles
