When you sneeze into your hands and touch something and then someone touches a object. Then eat or touch their eye it gets into their system and thats how bacteria and fungi get into you.
The correct answer is B. Brown eyes are dominant. Each parent has a brown gene and a blue gene. Their child got the blue gene from each parent and has two blue genes which is the only way recessive genes are phenotypically expressed.
Those two are the muscular system and the excretory system because you use your muscles to push up and down and your excretory system produces the sweat you use while doing them
