Yellow Colonies: <span>Staphylococcus aureus (gram-)
Pink Colonies: MacConkey agar (gram+)</span>
The best and most correct answer among the choices provided by the question is the third choice. The results of Medel's experiment had occured because there <span>always were either one color or the other</span>I hope my answer has come to your help. God bless and have a nice day ahead!
A will be the sky is blue
A Non-mutagenic factor listed in the options is : ( B ) Drinking water
<h3>Mutagenic factor </h3>
Mutagenic factors are chemical elements or various forms of radiations such as X-rays, UV rays, Sun rays, which may cause a permanent and heritable changes ( mutations ) in the DNA, when exposed to these mutagenic factors.
Hence we can conclude that a Non-mutagenic factor is Drinking water
Learn more about Mutagenic factor : brainly.com/question/1866437
I would answer but you didn't put any pictures so I can't see what shows anything.