The answer should be allele(s).
Alleles are alternative forms of genes. For example in eye color, there is brown eye allele that produces brown eyes or blue eye alleles that produces blue eyes.
However, note that there may be dominant or recessive alleles. Dominant alleles are always expressed, meanwhile, recessive allele is only expressed when there is no dominant allele existing.
An example is let say brown eye allele is dominant and blue eye allele is recessive. The eye gene is controlled by 2 alleles. If I had one brown eye allele and 1 blue, my eyes will be brown, because brown eye allele is dominant.
I believe it's B from my knowledge
A beaker containing a certain substance has heat applied to it. The particles that make up the substance begin to move farther apart from each other. The change of state that could be occurring in the beaker is the substance is changing from a liquid to a gas.
Because they may just never know they can't know every case that has happened lol
