<span>it comes and goes through the madreporite - a small valve like structure</span>
B) Frost
Frost is a thin layer of ice on a solid surface, which forms from water vapor in an above freezing atmosphere coming in contact with a solid surface whose temperature is below freezing, and resulting in a phase change from water vapor to ice as the water vapor reaches the freezing point.
X is the dominant allele / curly hair , females have two X chromosomes and males have an X and Y
