What do we call someone who is heterozygous for a genetic disease they do not show the trait but you have won recessive allele

In iceland, the mid atlantic ridge runs through the center of the contry. what can you conclude about the apperence of iceland many thousands of years from now?

Each pair of clay balls represents two planetesimals. if each planetesimal is composed of the same material and is separated he the same distance, which pair experiences the frayed gravitational attraction?

Which of the following is not considered an appendage of the skin? nails glands follicles none of the above